Molekula
Salicylic acid impurity B - EP CRS
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
Salicylic acid impurity B (4-hydroxyisophthalic acid) is a crystalline organic compound used as a reference standard in pharmaceutical analysis, particularly for validating salicylic acid purity under the European Pharmacopoeia (EP) and Certified Reference Standard (CRS) protocols. It serves as a key analytical benchmark for detecting and quantifying impurities in drug formulations. This product has a CAS number of 636-46-4, with the molecular formula HOC6H3-1,3-(CO2H)2 and a molecular weight of 182.13 g/mol. It is stable at ambient storage conditions and carries a Warning signal word under GHS classification. Molekula supplies Salicylic acid impurity B - EP CRS 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.
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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 | Solid |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Acidity | Acid |
Identification
| Property | Value |
|---|---|
| SKU | 90037175 |
| CAS Number | 636-46-4 |
| Molecular Formula | HOC6H3-1,3-(CO2H)2 |
| Molecular Weight | 182.13 |
| SMILES | C1=CC(=C(C=C1C(=O)O)C(=O)O)O |
| REACH Code | Y110 |
| HTS Code | 2918.29.00 |
| Tariff Code | 2918290090 |
Safety & GHS
-
Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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 Salicylic acid impurity B (EP CRS) used for?
This reference standard is primarily used for analytical testing, such as HPLC or GC methods, to verify the identity and purity of salicylic acid in pharmaceutical formulations.
What is the chemical formula and molecular weight of Salicylic acid impurity B?
The chemical formula is HOC₆H₃-1,3-(CO₂H)₂ (4-hydroxyisophthalic acid, also called 4-hydroxybenzene-1,3-dicarboxylic acid), and the molecular weight is 182.13 g/mol.
How should Salicylic acid impurity B (EP CRS) be stored?
Store at ambient temperature in a tightly sealed container, away from moisture and direct sunlight.
What grade of Salicylic acid impurity B does Molekula supply?
Molekula supplies this product as EP CRS (European Pharmacopoeia Certified Reference Standard), meeting strict purity and documentation requirements for analytical use.
Can Molekula supply Salicylic acid impurity B in bulk quantities?
While this product is typically supplied in smaller analytical quantities, Molekula can discuss bulk or custom packaging options—please contact our sales team for availability.
What documentation comes with an order of Salicylic acid impurity B (EP CRS)?
Each order includes a Certificate of Analysis (CoA), Safety Data Sheet (SDS), and batch-specific documentation confirming EP CRS compliance and purity.
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.