Toxopyrimidine

Name: Toxopyrimidine
Brand: Vaqora Chemicals
SKU: VQ-027102

About Toxopyrimidine

Listed under CAS 73-67-6, Toxopyrimidine is an impurity of Thiamine available from Vaqora Chemicals. Its molecular formula is C6H9N3O and its molecular weight is 139.16 g/mol. Its systematic (IUPAC) name is (4-amino-2-methylpyrimidin-5-yl)methanol. Alternative names: 4-Amino-2-methyl-5-pyrimidinemethanol and Thiamine Toxopyrimidine.

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. It carries the GHS signal word “Warning” with 3 hazard statements. Review the Safety Data Sheet before use.

As a characterised impurity of Thiamine, it is used for analytical method development, method validation (AMV) and routine quality-control testing, and it supports ANDA and DMF regulatory filings. Typical end-use sectors are pharmaceutical manufacturing and academic and industrial research.

Vaqora Chemicals supplies Toxopyrimidine in 10 mg, 25 mg, 50 mg and 100 mg packs, each shipped with a Certificate of Analysis (COA), and exports worldwide.

Typical applications

Analytical method development
Method validation (AMV)
QC release testing
ANDA / DMF filings

Industries

Related to Thiamine

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

Thiamine impurities

Specifications & identifiers

Chemical identifiers
Product name	Toxopyrimidine
Catalogue No.	VQ-027102
CAS Number	73-67-6
IUPAC name	(4-amino-2-methylpyrimidin-5-yl)methanol
Molecular formula	C₆H₉N₃O
Molecular weight	139.16 g/mol
Exact mass	139.0746
Grade	Reference Standard
HSN code	38229090
InChIKey	VUTBELPREDJDDH-UHFFFAOYSA-N
SMILES	CC1=NC=C(C(=N1)N)CO
PubChem CID	777

Physical properties
Physical form	Solid
LogP (XLogP3)	-0.1
H-bond donors / acceptors	2 / 4
TPSA	72 Å²
Synonyms	4-Amino-2-methyl-5-pyrimidinemethanol, Thiamine Toxopyrimidine, 4-amino-5-hydroxymethyl-2-methylpyrimidine, Atoxopyrimidine, 2-Methyl-4-amino-5-hydroxymethylpyrimidine, 2-M-4-A-5-Hmp, 4-amino-2-methyl-5-hydroxymethylpyrimidine, 4-A-2-MEP, (4-Amino-2-methyl-5-pyrimidinyl)methanol, 5-Pyrimidinemethanol, 4-amino-2-methyl-, Oxymethylpyrimidine, Pyramine (VAN)

Safety & hazard information (GHS)

Harmful / irritant

Signal word: Warning

Hazard statements

H315Causes skin irritation
H319Causes serious eye irritation
H335May cause respiratory irritation

Precautionary statements: P261, P264, P264 + P265, P271, P280, P302 + P352, P304 + P340, P305 + P351 + P338, P319, P321, P332 + P317, P337 + P317, P362 + P364, P403 + P233, P405, P501

Classification is indicative (aggregated GHS notifications) and may vary by grade and concentration. Always refer to the SDS supplied with your lot.

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 Toxopyrimidine?

The CAS Registry Number of Toxopyrimidine is 73-67-6. It is also known as 4-Amino-2-methyl-5-pyrimidinemethanol, Thiamine Toxopyrimidine, 4-amino-5-hydroxymethyl-2-methylpyrimidine.

What is the molecular formula and molecular weight of Toxopyrimidine?

Toxopyrimidine has the molecular formula C6H9N3O and a molecular weight of 139.16 g/mol. Its IUPAC name is (4-amino-2-methylpyrimidin-5-yl)methanol.

What is Toxopyrimidine used for?

Toxopyrimidine is supplied as a characterised reference material related to Thiamine. 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 Toxopyrimidine can I order?

We supply Toxopyrimidine 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 Toxopyrimidine?

Yes. Every lot of Toxopyrimidine 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 Toxopyrimidine be shipped internationally?

Yes. Toxopyrimidine is classified as hazardous, so it is packed in UN-approved packaging and shipped as dangerous goods under IATA/IMDG rules. We export worldwide on EXW, FOB, CIF and DAP terms.