Molekula
Hydroquinone - USP reference standard
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
Hydroquinone (CAS 123-31-9) is a white crystalline organic compound widely used as a pharmaceutical reference standard, particularly in dermatology for skin-lightening treatments and as a chemical intermediate in pharmaceutical synthesis. It adheres to USP specifications for purity and consistency in analytical applications. This product has the molecular formula C6H4(OH)2 and a molecular weight of 110.11 g/mol. It must be stored at ambient conditions and handled with caution, as it carries a **Danger** signal word due to its potential health risks. Full safety data is provided with documentation. Molekula supplies Hydroquinone - USP reference standard 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
Pack sizes & pricing
Pricing on request — packs available from research to bulk quantities.
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 | Off-white powder |
| Identification | Conforms to reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 165 °C |
| Transport Class | 6.1 |
| Packing Group | III |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90033092 |
| CAS Number | 123-31-9 |
| Molecular Formula | C6H4(OH)2 |
| Molecular Weight | 110.11 |
| SMILES | C1=CC(=CC=C1O)O |
| UN Number | UN2811 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2907.22.5000 |
| Tariff Code | 2907220010 |
Safety & GHS
-
Corrosive
GHS05
-
Toxic
GHS06
-
Health Hazard
GHS07
-
Serious Health Hazard
GHS08
-
Hazardous to the Environment
GHS09
Hazard statements
- H301 Toxic if swallowed
- H317 May cause an allergic skin reaction
- H318 Causes serious eye damage
- H341 Suspected of causing genetic defects
- H351 Suspected of causing cancer
- H400 Very toxic to aquatic life
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P273 Avoid release to the environment
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, Russian, Spanish.
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
No alternate names recorded for this product.
Frequently asked questions
What is Hydroquinone USP reference standard primarily used for?
Hydroquinone USP reference standard is used for analytical quality control, calibration of instruments, and as a reference material in pharmaceutical testing to ensure compliance with USP specifications.
What is the chemical formula and molecular weight of Hydroquinone?
The chemical formula is **C₆H₄(OH)₂** and the molecular weight is **110.11 g/mol**.
How should Hydroquinone USP reference standard be stored?
Store at **ambient temperature** in a tightly sealed container, protected from light and moisture.
What grade of Hydroquinone is this, and is it suitable for pharmaceutical applications?
This is a **USP reference standard grade**, meeting strict purity and quality requirements for pharmaceutical testing and regulatory compliance.
Can Molekula supply Hydroquinone USP reference standard in bulk quantities?
Bulk quantities may be available upon request—please contact Molekula’s sales team for pricing and minimum order quantities.
What documentation comes with the order of Hydroquinone USP reference standard?
Each order includes a **Certificate of Analysis (CoA)**, batch-specific documentation, and a Material Safety Data Sheet (MSDS).
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.