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

Name: PAR, indicator, EP/Ph. Eur., ACS
Brand: Vaqora Chemicals
SKU: VQ-047245

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

Vaqora Chemicals supplies PAR, indicator in EP/Ph. Eur. / ACS / AR grade, a biological stain registered under CAS number 16593-81-0. Formula C11H10N3NaO3, molecular weight 255.2 g/mol.

Keep the container tightly sealed and store it in a cool, dry area. 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 5 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, EP/Ph. Eur., ACS
Catalogue No.	VQ-047245
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	EP/Ph. Eur. / ACS / AR
HSN code	29339990
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

Extra Pure

PAR, indicator, extra pure

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

VQ-045982

Frequently asked questions

What is the CAS number of PAR, indicator, EP/Ph. Eur., ACS?

The CAS Registry Number of PAR, indicator, EP/Ph. Eur., ACS 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, EP/Ph. Eur., ACS?

PAR, indicator, EP/Ph. Eur., ACS has the molecular formula C11H10N3NaO3 and a molecular weight of 255.2 g/mol.

Which grade and pack sizes of PAR, indicator, EP/Ph. Eur., ACS can I order?

We supply PAR, indicator, EP/Ph. Eur., ACS in EP/Ph. Eur. / ACS / AR grade, in 1 g, 5 g packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with PAR, indicator, EP/Ph. Eur., ACS?

Yes. Every lot of PAR, indicator, EP/Ph. Eur., ACS 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, EP/Ph. Eur., ACS be shipped internationally?

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