N-Nitroso-4-aminobenzoic Acid

Name: N-Nitroso-4-aminobenzoic Acid
Brand: Vaqora Chemicals
SKU: VQ-047980

About N-Nitroso-4-aminobenzoic Acid

Listed under CAS 91673-51-7, N-Nitroso-4-aminobenzoic Acid is a nitrosamine impurity of Deferasirox available from Vaqora Chemicals. Formula C7H6N2O3, molecular weight 166.13 g/mol. The IUPAC name is 4-(2-oxohydrazinyl)benzoic acid. Alternative names: 4-(Nitrosoamino)benzoic acid and 4-hydroxy azo benzoic acid.

The product is provided as a solid. Reference materials should be stored sealed and away from light and moisture, as specified on the accompanying COA. Good laboratory practice and suitable PPE are recommended during handling.

Laboratories use this nitrosamine standard to develop and validate highly sensitive LC-MS/MS methods, to confirm limits of detection and to document nitrosamine risk assessments in regulatory submissions. It is used across pharmaceutical manufacturing and academic and industrial research.

We offer N-Nitroso-4-aminobenzoic Acid in 10 mg, 25 mg, 50 mg and 100 mg packs with a batch-specific COA, and ship to customers worldwide.

Typical applications

Nitrosamine risk assessment
Trace LC-MS/MS quantitation
Method validation (AMV)
Regulatory submissions

Industries

Related to Deferasirox

View every impurity, metabolite and intermediate we list for Deferasirox.

Deferasirox impurities

Specifications & identifiers

Chemical identifiers
Product name	N-Nitroso-4-aminobenzoic Acid
Catalogue No.	VQ-047980
CAS Number	91673-51-7
IUPAC name	4-(2-oxohydrazinyl)benzoic acid
Molecular formula	C₇H₆N₂O₃
Molecular weight	166.13 g/mol
Exact mass	166.0378
Grade	Reference Standard
HSN code	38229090
InChIKey	ZENPAMSYUBFEOH-UHFFFAOYSA-N
SMILES	C1=CC(=CC=C1C(=O)O)NN=O
PubChem CID	10012265

Physical properties
Physical form	Solid
LogP (XLogP3)	1.1
H-bond donors / acceptors	2 / 5
TPSA	78.8 Å²

Documents

Safety Data Sheet (SDS)16-section GHS · on request Certificate of AnalysisTypical / batch COA · on request Specification sheetTDS / MOA · on request

Frequently asked questions

What is the CAS number of N-Nitroso-4-aminobenzoic Acid?

The CAS Registry Number of N-Nitroso-4-aminobenzoic Acid is 91673-51-7. It is also known as 4-(Nitrosoamino)benzoic acid, 4-hydroxy azo benzoic acid, 4-(Nitrosoamino)-benzoic acid.

What is the molecular formula and molecular weight of N-Nitroso-4-aminobenzoic Acid?

N-Nitroso-4-aminobenzoic Acid has the molecular formula C7H6N2O3 and a molecular weight of 166.13 g/mol. Its IUPAC name is 4-(2-oxohydrazinyl)benzoic acid.

What is N-Nitroso-4-aminobenzoic Acid used for?

N-Nitroso-4-aminobenzoic Acid is supplied as a characterised reference material related to Deferasirox. It is used for analytical method development and validation (AMV), impurity profiling, stability studies and quality control, and in ANDA/DMF regulatory filings.

Which grade and pack sizes of N-Nitroso-4-aminobenzoic Acid can I order?

We supply N-Nitroso-4-aminobenzoic Acid in Reference Standard grade, in 10 mg, 25 mg, 50 mg, 100 mg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with N-Nitroso-4-aminobenzoic Acid?

Yes. Every lot of N-Nitroso-4-aminobenzoic Acid is shipped with a batch-specific Certificate of Analysis, and a 16-section GHS Safety Data Sheet is provided with the quotation and the shipment.

Can N-Nitroso-4-aminobenzoic Acid be shipped internationally?

Yes. We export N-Nitroso-4-aminobenzoic Acid worldwide by air and sea freight or express courier, on EXW, FOB, CIF, CFR or DAP Incoterms, with full export documentation.