Molekula
Kojic acid
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Kojic acid is an organic compound derived from fungal fermentation, widely used in cosmetics and skincare for its skin-lightening and melanin-inhibiting properties. It is also employed in food preservation and as a reagent in chemical synthesis. This white to off-white crystalline powder has a CAS number of 501-30-4, a molecular formula of C6H6O4, and a molecular weight of 142.11 g/mol. It is non-hazardous (no signal word) and stable under ambient storage conditions. Molekula supplies Kojic acid from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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25 g — £34.20 per pack ex VAT · £41.04 inc. VAT
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100 g — £108.80 per pack ex VAT · £130.56 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | White to Almost White crystals |
| Heavy metals | ≤3ppm |
| Loss on Drying | ≤0.5% |
| Chloride (Cl-) | ≤50ppm |
| Assay | ≥99.0% |
| Residue on Ignition | ≤0.10% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Crystals |
| Melting Point | 153.5 °C |
| Solubility (other solvents) | Soluble in ethanol, ethyl ether, acetone, DMSO; slightly soluble in benzene |
| pKa | pKa = 7.66 |
| log P (octanol/water) | -0.64 |
Source: PubChem CID 3840 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 31686564 |
| CAS Number | 501-30-4 |
| IUPAC Name | 5-hydroxy-2-(hydroxymethyl)pyran-4-one |
| EC Number | 207-922-4 |
| Molecular Formula | C6H6O4 |
| Molecular Weight | 142.11 |
| Exact Mass | 142.0266 |
| SMILES | C1=C(OC=C(C1=O)O)CO |
| InChIKey | BEJNERDRQOWKJM-UHFFFAOYSA-N |
| InChI | InChI=1S/C6H6O4/c7-2-4-1-5(8)6(9)3-10-4/h1,3,7,9H,2H2 |
| PubChem CID | 3840 |
| REACH Code | Y110 |
| HTS Code | 29329900 |
| Tariff Code | 2941900000 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- 2-(Hydroxymethyl)-5-hydroxy-4H-pyran-4-one
- 2-Hydroxymethyl-5-hydroxy-gamma-pyrone
- 4H-PYRAN-4-ONE, 5-HYDROXY-2-(HYDROXYMETHYL)-
- 5-Hydroxy-2-(hydroxymethyl)-4-pyrone
- 5-Hydroxy-2-(hydroxymethyl)-4H-pyran-4-one
- 5-hydroxy-2-(hydroxymethyl)pyran-4-one
- acido kojico
- Beaute
- Cleansing Pasds
- TurmericKojicSoap
Frequently asked questions
What is kojic acid commonly used for?
Kojic acid is primarily used as a skin-lightening agent in cosmetics and personal care products, as well as a preservative and antioxidant in food and pharmaceutical applications.
What is the chemical formula and molecular weight of kojic acid?
The chemical formula is **C₆H₆O₄**, and the molecular weight is **142.11 g/mol**.
How should kojic acid be stored?
Store kojic acid at **ambient temperature** in a cool, dry place, away from direct sunlight and moisture.
What grades of kojic acid does Molekula supply?
Molekula supplies kojic acid in **pharmaceutical, cosmetic, and food-grade** purity levels, depending on the application.
Can Molekula supply kojic acid in bulk quantities?
Yes, we offer kojic acid in bulk packaging options, including drums and custom quantities, to meet industrial and commercial needs.
What documentation is provided with a kojic acid order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and batch-specific documentation for traceability.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.