PAR, indicator, extra pure

Name: PAR, indicator, extra pure
Brand: Vaqora Chemicals
SKU: VQ-045982

About PAR, indicator, extra pure

PAR, indicator is a biological stain in Extra Pure grade carrying the CAS registry number 16593-81-0. Its molecular formula is C11H10N3NaO3 and its molecular weight is 255.2 g/mol.

Store in a tightly closed container in a cool, dry and well-ventilated place. Under GHS it is labelled “Warning”, so handle it with suitable PPE and consult the SDS.

Key uses span histology and cytology staining, microscopy and clinical laboratories. Our customers for this product work in academic and industrial research, diagnostics and biotechnology and textiles and dyeing.

Standard pack sizes are 1 g, and every batch ships with a Certificate of Analysis (COA) and we export worldwide. SDS and detailed specification sheets can be requested with your quotation. Larger quantities and custom packaging are available. Request a quote for pricing and lead time.

Typical applications

Histology & cytology staining
Microscopy
Clinical laboratories

Industries

Grade guides

Specifications & identifiers

Chemical identifiers
Product name	PAR, indicator, extra pure
Catalogue No.	VQ-045982
CAS Number	16593-81-0
IUPAC name	sodium;3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate;hydrate
Molecular formula	C₁₁H₁₀N₃NaO₃
Molecular weight	255.2 g/mol
Exact mass	255.062
Grade	Extra Pure
HSN code	29333990
InChIKey	KMHFHNVYQMFVAN-UHFFFAOYSA-M
SMILES	C1=CC=NC(=C1)N=NC2=C(C=C(C=C2)[O-])O.O.[Na+]
PubChem CID	135442939

Physical properties
Physical form	Other
H-bond donors / acceptors	2 / 6
TPSA	81.9 Å²
Synonyms	1,3-Benzenediol, 4-(2-pyridinylazo)-, monosodium salt, monohydrate, sodium (E)-3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate hydrate, sodium 3-hydroxy-4-[(1E)-2-(pyridin-2-yl)diazen-1-yl]benzen-1-olate hydrate, 4-(2-pyridylazo) resorcinol monosodium salt hydrate, 4-(2-pyridyldiazenyl)benzene-1,3-diol, sodium salt, hydrate, Sodium 3-oxo-4-[2-(pyridin-2-yl)hydrazinylidene]cyclohexa-1,5-dien-1-olate--water (1/1/1)

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

Other grades of CAS 16593-81-0

Microscopy

PAR, indicator, 99%+

CAS: 16593-81-0
Formula: C₁₁H₁₀N₃NaO₃
MW: 255.2 g/mol

VQ-000677

ACS / AR

PAR, indicator, ACS ≥90.00%

CAS: 16593-81-0
Formula: C₁₁H₁₀N₃NaO₃
MW: 255.2 g/mol

VQ-045603

EP/Ph. Eur. / ACS / AR

PAR, indicator, EP/Ph. Eur., ACS

CAS: 16593-81-0
Formula: C₁₁H₁₀N₃NaO₃
MW: 255.2 g/mol

VQ-047245

Frequently asked questions

What is the CAS number of PAR, indicator, extra pure?

The CAS Registry Number of PAR, indicator, extra pure is 16593-81-0. It is also known as 1,3-Benzenediol, 4-(2-pyridinylazo)-, monosodium salt, monohydrate, sodium (E)-3-hydroxy-4-(pyridin-2-yldiazenyl)phenolate hydrate, sodium 3-hydroxy-4-[(1E)-2-(pyridin-2-yl)diazen-1-yl]benzen-1-olate hydrate.

What is the molecular formula and molecular weight of PAR, indicator, extra pure?

PAR, indicator, extra pure has the molecular formula C11H10N3NaO3 and a molecular weight of 255.2 g/mol.

Which grade and pack sizes of PAR, indicator, extra pure can I order?

We supply PAR, indicator, extra pure in Extra Pure grade, in 1 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with PAR, indicator, extra pure?

Yes. Every lot of PAR, indicator, extra pure 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 PAR, indicator, extra pure be shipped internationally?

Yes. PAR, indicator, extra pure 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.