Product division
Impurities & Reference Standards
Pharmacopoeial and non-pharmacopoeial impurities, metabolites, nitrosamines and working standards with characterisation data for QC and regulatory work.
28,554products
6sub-categories
2,746in stock
COA + SDSwith every lot
API Impurities 14,252Pharmacopeial Impurities (EP / USP / BP) 4,401Nitrosamine Impurities 650Stable Isotope Labelled Standards (Deuterated, 13C, 15N) 1,612Metabolites & Degradation Products 4,146API Reference Standards 3,493
![4,4'-(Carbonyldiimino)bis[benzoic acid] ethyl ester chemical structure](/media/structures/PJNQSLGBJUMCFZ-UHFFFAOYSA-N.svg)
4,4'-(Carbonyldiimino)bis[benzoic acid] ethyl ester
- CAS
- 78015-36-8
- Formula
- C19H20N2O5
- MW
- 356.4 g/mol
VQ-029394
4,4'-(Oxybis(phenylmethylene))bis(chlorobenzene)
- CAS
- 62084-35-9
- Formula
- C26H20Cl2O
- MW
- 419.3 g/mol
VQ-047749
4,4'-(Sulfonylbis(4,1-phenylene))bis(5-methyl-3-phenylisoxazole)
- CAS
- 2338845-31-9
- Formula
- C32H24N2O4S
- MW
- 532.6 g/mol
VQ-044893
![4,4'-[Methylenebis(methylimino)]diantipyrine chemical structure](/media/structures/GEFDLFMKEPTYLA-UHFFFAOYSA-N.svg)
4,4'-Azanediylbis(N-(pyridin-2-yl)benzenesulfonamide)
- CAS
- 2033064-46-7
- Formula
- C22H19N5O4S2
- MW
- 481.6 g/mol
VQ-027162
Need a price, a spec or a custom compound?
Send us your list — product names or CAS numbers, grade, quantity and destination. Our team replies with a formal quotation, COA and lead time.