Citric Acid Impurity 5 CAS 5949-29-1
| CAS No. | 5949-29-1 |
| Molecular Formula | C6H8O7 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Citric Acid Impurity 5 (CAS 5949-29-1), a pharmacopoeial impurity reference standard (molecular formula C6H8O7H2O, MW 210.14 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a carbohydrate-derived structure, Citric Acid Impurity 5 is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 210.14 g/mol — guide the selection of appropriate sample preparation and analytical techniques.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C6H8O7 H2O |
| Molecular Weight | 210.14 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1958 |
Related Citric Standards
- Citric Acid tert-Butyl Ester (CAS 114340-52-2)
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- Citric-2,2,4,4-d4Acid (CAS 147664-83-3)
- Citric Acid (3-Methanethiosulfonate Ethyl Amide) (CAS 1797099-42-3)
- 206986-90-5 Citric acid trisilver salt hydrate Silver citrate hydrate (CAS 206986-90-5)
- Citric Acid impurity 8 (CAS 30306-93-5)
- 31886-41-6 Citric acid, ammonium bismuth salt EINECS 250-856-6 (CAS 31886-41-6)
- Citric acid isopropyl ester, mixture (CAS 39413-05-3)
Recommended Standards
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- 1-(O-tolyloxy)propan-2-ol (CAS 4317-61-7)
- tert-Butyl 4-bromo-2-methylpiperidine-1-carboxylate (CAS 1281576-23-5)
- 6-Bromo-N-methylbenzo[d]isoxazol-3-amine (CAS 1780867-97-1)
- 551936-17-5 3JX85UOO24 AIM-102 UNII-3JX85UOO24 (4R)-4-(((2R)-2-Amino-3-cyclohexyl-propanoyl)amino)-5-(carboxymethylamino)-5-oxo-pentanoic acid D-Cyclohexylalanine-D-glutamic-glycine tripeptide Glycine, 3-cyclohexyl-D-alanyl-D-alpha-glutamyl- (CAS 551936-17-5)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com