# Benzyl alcohol
**Benzyl alcohol** (C₆H₅CH₂OH, also called phenylmethanol or phenylcarbinol; CAS 100-51-6) is an aromatic alcohol, a colorless liquid with a faint aromatic odor that occurs naturally in plants and balsams and is produced industrially on a large scale as a solvent, preservative, fragrance ingredient, and, in the form of a 5% lotion, a prescription treatment for head lice.[1](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng) • [2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) • [3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf)
| Key fact | Detail |
|---|---|
| Physical constants | Boiling point 204.7 °C; melting point −15.2 °C; density 1.045; logP 1.1; dissolves 1 g in about 25 mL of water[2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) |
| Main industrial routes | Hydrolysis of benzyl chloride from toluene chlorination (the main route), or from benzaldehyde by hydrogenation, the Cannizzaro reaction, or the Tishchenko reaction[1](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng) • [3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) |
| Preservative concentrations | 2% in oral or parenteral pharmaceuticals, 3% in cosmetics, ≥5% as solubiliser, 10% in disinfectant solutions[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) |
| Neonatal hazard | Intravenous administration has been associated with serious adverse events and death in neonates ("gasping syndrome"); exposure above 90 mg/kg/day carries a risk of fatal toxic reactions[4](https://www.ema.europa.eu/en/documents/scientific-guideline/questions-and-answers-benzyl-alcohol-context-revision-guideline-excipients-label-and-package-leaflet-medicinal-products-human-use_en.pdf) |
| Metabolism | Oxidized to benzaldehyde, then benzoic acid, then conjugated with glycine to hippuric acid; 80% of an intravenous dose is excreted in urine as hippuric acid[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) |
| Food additive status | EFSA re-evaluated benzyl alcohol (E 1519) as of low acute toxicity with no genotoxicity or carcinogenicity concern and set an ADI of 4 mg/kg body weight per day[5](https://pmc.ncbi.nlm.nih.gov/articles/PMC7008871/) |
| Market | US$131 million in 2025, projected US$165 million by 2032 (3.4% CAGR); 2024 production about 500,000 tons at an average US$250/ton[6](https://www.qyresearch.com/reports/6008151/benzyl-alcohol) |
## Physical and chemical properties
Benzyl alcohol is a colorless liquid with a molecular weight of 108.14, a boiling point of 204.7 °C, a melting point of −15.19 °C, a density of 1.045, and a logP of 1.1; it dissolves 1 g in about 25 mL of water.[2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) Manufacturer data give a refractive index n20/D of 1.5396, a flash point of 94 °C, an ignition temperature of 435 °C, a vapor pressure of 0.13 hPa at 20 °C, and a dielectric constant of 13.1 at 25 °C.[7](https://www.itwreagents.com/download_file/tds/191081/en/tds_191081_en.pdf)
The combination of a high boiling point, low vapor pressure, and moderate water solubility underpins its solvent role: it dissolves poorly soluble drugs, acts as a non-reactive diluent for epoxy resins, and serves in coatings, inks, lacquers, waxes, and paint strippers.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/) • [9](https://gms-skyros.publisso.de/sites/default/files/documents/series/mak/dam/Vol2018/Iss3/Alt069/mb10051kske6318_w.pdf)
Benzyl alcohol oxidizes in air to benzaldehyde, so bulk storage under a nitrogen blanket is recommended, with aldehyde and peroxide content checked on receipt.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/) In pharmaceutical use this matters directly, because benzaldehyde present as an impurity accelerates oxidation of the alcohol itself and degradation of active ingredients, and special low-benzaldehyde grades are therefore sold.[10](https://www.sigmaaldrich.com/GU/en/technical-documents/technical-article/pharmaceutical-and-biopharmaceutical-manufacturing/liquid-formulation-strategies/commonly-used-preservatives-in-liquid-formulation)
## Production and natural occurrence
Industrial production runs mainly through toluene: chlorination of toluene gives benzyl chloride, which is hydrolyzed in the presence of sodium or potassium carbonate to benzyl alcohol.[1](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng) • [2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) A second family of routes starts from benzaldehyde, using hydrogenation, the [Cannizzaro reaction](https://www.edgepedia.org/cannizzaro-reaction), or the Tishchenko reaction.[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) The toluene chlorination route is identified as the main one.[1](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng)
Benzyl alcohol also occurs in nature. It is found in more than half of seed plant families, where it serves as a precursor of benzyl benzoate and participates in plant-environment interactions; natural sources used for extraction include Tolu and Peru balsam and jasmine extracts.[11](https://www.nature.com/articles/s41467-026-75494-8) • [3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) In petunia flowers, two NADPH-dependent benzaldehyde reductases differing by only three amino acids form benzyl alcohol and its downstream derivatives.[11](https://www.nature.com/articles/s41467-026-75494-8)
Pharmacopeial and food specifications constrain quality. The USP–NF monograph requires not less than 98.0% and not more than 100.5% of C₇H₈O, with special labeling when the material is intended for injectable dosage forms.[12](http://www.uspbpep.com/usp31/nf26s1_m8570.asp) JECFA specifications require an assay of at least 98.0% and aldehydes (as benzaldehyde) of no more than 0.2% v/v.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/)
## Applications
**Preservative and solvent in medicines.** Benzyl alcohol is the preservative used most frequently in injections, and also in topical, oral, transmucosal, and otic applications.[10](https://www.sigmaaldrich.com/GU/en/technical-documents/technical-article/pharmaceutical-and-biopharmaceutical-manufacturing/liquid-formulation-strategies/commonly-used-preservatives-in-liquid-formulation) The EMA report lists typical concentrations of 2% in oral or parenteral preparations, 3% in cosmetics, at least 5% as a solubilising agent, and 10% in disinfectant solutions; it also serves as a local anesthetic.[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) Because of its anesthetic properties it is sometimes used to reduce pain on injection.[10](https://www.sigmaaldrich.com/GU/en/technical-documents/technical-article/pharmaceutical-and-biopharmaceutical-manufacturing/liquid-formulation-strategies/commonly-used-preservatives-in-liquid-formulation) The median concentration per intramuscular injection is 150 mg (30 mg/ml), with injected doses ranging from 20 to 600 mg/day.[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) It can be combined with parabens, potassium sorbate, BHT, EDTA, and benzyl benzoate.[10](https://www.sigmaaldrich.com/GU/en/technical-documents/technical-article/pharmaceutical-and-biopharmaceutical-manufacturing/liquid-formulation-strategies/commonly-used-preservatives-in-liquid-formulation)
**Industrial uses.** Benzyl alcohol is used for curing epoxy resins, as a solvent in waterborne coatings, in paint strippers, and as a preservative and flavor in food.[9](https://gms-skyros.publisso.de/sites/default/files/documents/series/mak/dam/Vol2018/Iss3/Alt069/mb10051kske6318_w.pdf) The EU anti-dumping regulation lists further uses as a fuel additive in gasoline, a dye aid in textile dyeing, and a precursor in chemical synthesis.[1](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng)
**Head lice.** In 2009 the FDA approved benzyl alcohol lotion, 5%, as a prescription medication for head lice ([Pediculosis capitis](https://www.edgepedia.org/pediculosis-capitis)) in patients aged 6 months and older.[2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996)
## Pharmacology and metabolism
After absorption, benzyl alcohol is rapidly oxidized, first to benzaldehyde and then to benzoic acid. The EMA report attributes the first step to alcohol dehydrogenase, a cytoplasmic enzyme present mainly in the liver but also in the intestine and kidney, and notes that the reaction is saturable; aldehyde dehydrogenases then oxidize benzaldehyde to benzoic acid.[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) The MAK documentation records a different description for humans: in human liver microsomes, cytochrome P450, not alcohol dehydrogenase, has been described as the metabolizing enzyme (Chapman et al. 1990), while adult mice use alcohol and aldehyde dehydrogenases.[9](https://gms-skyros.publisso.de/sites/default/files/documents/series/mak/dam/Vol2018/Iss3/Alt069/mb10051kske6318_w.pdf)
[Benzoic acid](https://www.edgepedia.org/benzoic-acid) reacts with glycine in the liver to form hippuric acid, which is quickly excreted in urine; 75–100% of a dose is excreted within 6 hours.[5](https://pmc.ncbi.nlm.nih.gov/articles/PMC7008871/) In adults given 15 mg/kg intravenously, the elimination half-life from plasma is 16 minutes for benzoic acid and 31 minutes for hippuric acid, with 80% of the dose eliminated in urine as hippuric acid and clearance of approximately 600 ml/min.[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf) The MAK documentation gives the same overall picture, with about 80% eliminated as hippuric acid and up to 20% as glucuronide.[9](https://gms-skyros.publisso.de/sites/default/files/documents/series/mak/dam/Vol2018/Iss3/Alt069/mb10051kske6318_w.pdf)
Infants handle the pathway differently. Pre-term neonates accumulate more benzyl alcohol in serum, in both peak level and area under the curve, than full-term neonates, and their benzoic acid detoxification is immature, with glycine-limited conjugation saturating more quickly.[3](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf)
## Safety and regulation
**Gasping syndrome.** Intravenous administration of benzyl alcohol has been associated with serious adverse events and death in neonates, a presentation known as "gasping syndrome"; the minimum amount of benzyl alcohol at which toxicity may occur is not known.[4](https://www.ema.europa.eu/en/documents/scientific-guideline/questions-and-answers-benzyl-alcohol-context-revision-guideline-excipients-label-and-package-leaflet-medicinal-products-human-use_en.pdf) EMA guidance states that, because of the risk of fatal toxic reactions from exposure to benzyl alcohol in excess of 90 mg/kg/day, products should not be used in infants and children up to 3 years old, and that benzyl alcohol should not be used in pre-term or full-term neonates unless strictly necessary.[4](https://www.ema.europa.eu/en/documents/scientific-guideline/questions-and-answers-benzyl-alcohol-context-revision-guideline-excipients-label-and-package-leaflet-medicinal-products-human-use_en.pdf) FDA labeling for heparin sodium injection likewise recommends preservative-free product, when available, for neonates and infants, because the preservative benzyl alcohol has been associated with serious adverse events and death, particularly in pediatric patients.[13](https://www.accessdata.fda.gov/drugsatfda_docs/nda/2011/201370Orig1s000OtherR.pdf) An EU Scientific Committee opinion on the safety of benzyl alcohol in parenteral medicinal products, adopted on 10 February 1999, reviewed the scientific data behind the contraindication approved by the Pharmaceutical Committee in 1997.[14](https://ec.europa.eu/health/scientific_committees/emerging/opinions/scmpmd/scmp_out15_en.htm)
**Intake limits.** EFSA's re-evaluation of benzyl alcohol as the food additive E 1519 found low acute toxicity and no genotoxicity or carcinogenicity concern, and established an acceptable daily intake of 4 mg/kg body weight per day based on a NOAEL of 400 mg/kg bw per day from a rat carcinogenicity study.[5](https://pmc.ncbi.nlm.nih.gov/articles/PMC7008871/) JECFA, by contrast, established an ADI of 0–5 mg/kg body weight in 1979, maintained at its 1996 meeting.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/)
**Cosmetic limits and allergen labeling.** The Cosmetic Ingredient Review Expert Panel set a maximum safe concentration of 5% for benzyl alcohol in cosmetics and 10% in hair dyes, judging that current usage levels and concentrations of benzyl alcohol, benzoic acid and its salts, and benzyl benzoate pose no safety concern.[2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) ECHA lists benzyl alcohol among substances restricted in EU cosmetic products except under Annex III conditions, and among allowed preservatives in Annex V with maximum concentration limits and special labeling requirements.[15](https://echa.europa.eu/substance-information/-/substanceinfo/100.002.600) Patch testing has shown allergenicity for 10% benzyl alcohol, alongside 1% phenoxyethanol, 5% benzoic acid, 5% sodium benzoate, and 2% sorbic acid.[16](https://preview-www.nature.com/articles/s41598-024-69624-9) Even though it is used extensively, benzyl alcohol appears in few routine patch test series, so its part in causing allergies can easily be missed; the American Contact Dermatitis Society designated it Allergen of the Year for 2026.[17](https://journals.sagepub.com/doi/10.1177/17103568251386038)
**Classification.** Since 1 September 2025 the EU harmonized classification (21st ATP) has been Warning with H302 (harmful if swallowed), H319 (serious eye irritation), and H317 (may cause an allergic skin reaction), whereas most existing industry notifications list H302 and H332.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/) Under the legal classification in Directive 67/548/EEC and Regulation (EC) No 1272/2008, benzyl alcohol is not classified as a skin irritant.[18](https://echa.europa.eu/registration-dossier/-/registered-dossier/14748/7/4/1)
## Comparison with related compounds
**Benzyl benzoate** is the larger, far more lipophilic sibling: molecular weight 212.24 and logP 3.68, practically insoluble in water, compared with benzyl alcohol's logP 1.1.[2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) Its acaricidal use differs accordingly: benzyl benzoate (10%) has been used to treat scabies in developing countries, while benzyl alcohol's 5% lotion targets head lice.[2](https://journals.sagepub.com/doi/full/10.1177/1091581817728996) In plants the relationship runs the other way, with benzyl alcohol serving as a precursor of benzyl benzoate.[11](https://www.nature.com/articles/s41467-026-75494-8)
**Benzaldehyde** is not an alternative but a quality problem: it appears as an impurity in benzyl alcohol and accelerates oxidation of the alcohol and degradation of active pharmaceutical ingredients, which is why low-benzaldehyde grades exist and JECFA caps aldehydes at 0.2% v/v.[10](https://www.sigmaaldrich.com/GU/en/technical-documents/technical-article/pharmaceutical-and-biopharmaceutical-manufacturing/liquid-formulation-strategies/commonly-used-preservatives-in-liquid-formulation) • [8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/)
**Phenoxyethanol** is the main competing cosmetic preservative. In infant and sensitive-skin cosmetics, preservatives with low allergenic potential such as phenoxyethanol, benzoic acid, sorbic acid, and benzyl alcohol have become dominant, while formaldehyde releasers, isothiazolinones, and iodopropynyl butylcarbamate were not identified in any such products.[16](https://preview-www.nature.com/articles/s41598-024-69624-9) The SCCS considers phenoxyethanol safe for all consumers, including children 0–3 years, at preservative concentrations below 1%.[16](https://preview-www.nature.com/articles/s41598-024-69624-9)
## By the numbers
The global benzyl alcohol market was valued at US$131 million in 2025 and is projected to reach US$165 million by 2032, a compound annual growth rate of 3.4% from 2026 to 2032.[6](https://www.qyresearch.com/reports/6008151/benzyl-alcohol) In 2024, global production reached 500,000 tons against a capacity of 550,000 tons, at an average selling price of US$250/ton and a gross profit margin of 30%.[6](https://www.qyresearch.com/reports/6008151/benzyl-alcohol)
Trade is concentrated in Asia and Europe. China is the largest exporter at about US$78 million (37% of world HS 290621 exports), followed by India at about US$42 million (20%), Germany at about US$40 million (19%), the Netherlands at about US$24 million (11%), and the United States at about US$10 million (5%), with world exports about US$211 million.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/) REACH registration sits in the 10,000 to 100,000 tonnes per year band, and US production reported to the EPA for 2023 was 40 to 55 million pounds.[8](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/)
[Trade policy](https://www.edgepedia.org/trade-policy) has moved against the dominant exporter. From 18 February 2026, imports of Chinese benzyl alcohol were made subject to registration to allow later levy of anti-dumping duties, following an investigation opened in December 2025.[19](https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ%3AL_202600362) The EU then imposed a provisional anti-dumping duty on Chinese benzyl alcohol effective 29 July 2026, at 71.2% of the net free-at-Union-frontier price, with individual rates of 52.6% to 66.8% for certain companies.[1](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng)
## References
1. [Commission Implementing Regulation (EU) 2026/1857 imposing a provisional anti-dumping duty on benzyl alcohol from China, EUR-Lex](https://eur-lex.europa.eu/eli/reg_impl/2026/1857/oj/eng)
2. [Safety Assessment of Benzyl Alcohol, Benzoic Acid and its Salts, and Benzyl Benzoate, International Journal of Toxicology (CIR, 2017)](https://journals.sagepub.com/doi/full/10.1177/1091581817728996)
3. [Benzyl alcohol and benzoic acid group used as excipients — EMA report (EMA/CHMP/508188/2013)](https://www.ema.europa.eu/en/documents/report/benzyl-alcohol-and-benzoic-acid-group-used-excipients-report-published-support-questions-and-answers-benzyl-alcohol-used-excipient-medicinal-products-human-use-emachmp5081882013-and-t_en.pdf)
4. [Q&A on benzyl alcohol in the revision of the guideline on excipients in the label and package leaflet (EMA, CPMP/463/00)](https://www.ema.europa.eu/en/documents/scientific-guideline/questions-and-answers-benzyl-alcohol-context-revision-guideline-excipients-label-and-package-leaflet-medicinal-products-human-use_en.pdf)
5. [Re-evaluation of benzyl alcohol (E 1519) as a food additive, EFSA Journal, FAF Panel](https://pmc.ncbi.nlm.nih.gov/articles/PMC7008871/)
6. [Global Benzyl Alcohol Market Research Report 2026, QY Research](https://www.qyresearch.com/reports/6008151/benzyl-alcohol)
7. [Benzyl alcohol technical data sheet, ITW Reagents](https://www.itwreagents.com/download_file/tds/191081/en/tds_191081_en.pdf)
8. [Benzyl alcohol: specifications, HS code 2906.21, grades and sourcing, GOV+](https://gov.plus/materials/epoxy-resins-and-hardeners/benzyl-alcohol/)
9. [Benzyl alcohol (MAK Value Documentation, 2018), DFG MAK Collection](https://gms-skyros.publisso.de/sites/default/files/documents/series/mak/dam/Vol2018/Iss3/Alt069/mb10051kske6318_w.pdf)
10. [Comparison of Preservatives Used in Various Therapeutic Applications, MilliporeSigma](https://www.sigmaaldrich.com/GU/en/technical-documents/technical-article/pharmaceutical-and-biopharmaceutical-manufacturing/liquid-formulation-strategies/commonly-used-preservatives-in-liquid-formulation)
11. [Benzyl alcohol biosynthesis and its subcellular compartmentalization enable scent formation and salicylic acid production, Nature Communications (2026)](https://www.nature.com/articles/s41467-026-75494-8)
12. [USP 31–NF 26 monograph: Benzyl Alcohol](http://www.uspbpep.com/usp31/nf26s1_m8570.asp)
13. [FDA NDA 201370 label, heparin sodium injection](https://www.accessdata.fda.gov/drugsatfda_docs/nda/2011/201370Orig1s000OtherR.pdf)
14. [EC Scientific Committee opinion on the safety of benzyl alcohol in parenteral medicinal products (10 February 1999)](https://ec.europa.eu/health/scientific_committees/emerging/opinions/scmpmd/scmp_out15_en.htm)
15. [ECHA substance information — benzyl alcohol in cosmetic and preservative restriction lists](https://echa.europa.eu/substance-information/-/substanceinfo/100.002.600)
16. [Deciphering trends in replacing preservatives in cosmetics intended for infants and sensitive populations, Scientific Reports (2024)](https://preview-www.nature.com/articles/s41598-024-69624-9)
17. [Benzyl Alcohol: Allergen of the Year 2026 (Le & Wu)](https://journals.sagepub.com/doi/10.1177/17103568251386038)
18. [ECHA registration dossier — Benzyl alcohol (EC 202-859-9, CAS 100-51-6)](https://echa.europa.eu/registration-dossier/-/registered-dossier/14748/7/4/1)
19. [Commission Implementing Regulation (EU) 2026/362 — registration of Chinese benzyl alcohol imports, EUR-Lex](https://eur-lex.europa.eu/legal-content/EN/TXT/PDF/?uri=OJ%3AL_202600362)
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*Topic: Encyclopedia › Physical world and mathematics › Chemistry › Organic substances › Alcohols, ethers, and organooxygen groups › Alcohols and polyols › Unsaturated and benzylic alcohols › Benzyl alcohol and parent chemistry*
*Initially written Sep 17, 2026 · Reviewed: Oct 15, 2026 · Edited: Oct 15, 2026 · Last review: Oct 15, 2026*
*Copyright 2026 EdgeChat AI, a subsidiary of Biostate AI.*
License: Edgepedia Community License 1.0, https://www.edgepedia.org/edgepedia/license