Phosphotungstic acid

Name: Phosphotungstic acid
Brand: Vaqora Chemicals
SKU: VQ-014983

About Phosphotungstic acid

Phosphotungstic acid is a refractory / heavy metal compound carrying the CAS registry number 12501-23-4. The compound has the formula H5O41PW12, corresponding to a molecular weight of 2898.1 g/mol. The IUPAC name is phosphoric acid. Dodecakis(trioxotungsten). Hydrate. It is also known as Tungstophosphoric acid or Phosphotungstic acid hydrate.

In its supplied form it is white to yellow to beige to grey powder or crystals. Keep the container tightly sealed and store it in a cool, dry area. It carries the GHS signal word “Danger” with 4 hazard statements. Review the Safety Data Sheet before use.

It is commonly used for biological staining and materials research. Our customers for this product work in academic and industrial research.

Standard pack sizes are 25 g, 100 g, 500 g and 5 kg, and every batch ships with a Certificate of Analysis (COA) and we export worldwide.

Typical applications

Biological staining
Materials research

Industries

Specifications & identifiers

Chemical identifiers
Product name	Phosphotungstic acid
Catalogue No.	VQ-014983
CAS Number	12501-23-4
IUPAC name	phosphoric acid;dodecakis(trioxotungsten);hydrate
Molecular formula	H₅O₄₁PW₁₂
Molecular weight	2898.1 g/mol
Exact mass	2897.2163
HSN code	28111990
InChIKey	AVFBYUADVDVJQL-UHFFFAOYSA-N
SMILES	O.OP(=O)(O)O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O.O=[W](=O)=O
PubChem CID	16212977

Physical properties
Physical form	Crystalline
Appearance	White to yellow to beige to grey powder or crystals
H-bond donors / acceptors	4 / 41
TPSA	693 Å²
UN number	UN 3260
Synonyms	Tungstophosphoric acid, Phosphoric acid--trioxotungsten--water (1/12/1), Phosphotungstic acid hydrate, 12-Tungstophosphoric acid hydrate, Hydrogen phosphotungstate hydrate (H3PW12O40.xH2O), Phosphotungstic acid, AR, Phosphotungstic acid hydrate, reagent grade, Phosphotungstic acid hydrate, for microscopy, Phosphotungstic acid hydrate, p.a., 99.5%, Phosphotungstic acid hydrate, SAJ special grade, Hydrogenphosphotungstatehydrate(H3PW12O40.xH2O)

Safety & hazard information (GHS)

Corrosive

Harmful / irritant

Environmental hazard

Signal word: Danger

Hazard statements

H302Harmful if swallowed
H314Causes severe skin burns and eye damage
H318Causes serious eye damage
H411Toxic to aquatic life with long lasting effects

Precautionary statements: P260, P264, P264 + P265, P270, P273, P280, P301 + P317, P301 + P330 + P331, P302 + P361 + P354, P304 + P340, P305 + P354 + P338, P316, P317, P321, P330, P363, P391, 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 12501-23-4

EP / AR

Phosphotungstic acid, EP, AR

CAS: 12501-23-4
Formula: H₅O₄₁PW₁₂
MW: 2898.1 g/mol

VQ-047287

AR

Phosphotungstic acid, GR

CAS: 12501-23-4
Formula: H₅O₄₁PW₁₂
MW: 2898.1 g/mol

VQ-014984

Frequently asked questions

What is the CAS number of Phosphotungstic acid?

The CAS Registry Number of Phosphotungstic acid is 12501-23-4. It is also known as Tungstophosphoric acid, Phosphoric acid--trioxotungsten--water (1/12/1), Phosphotungstic acid hydrate.

What is the molecular formula and molecular weight of Phosphotungstic acid?

Phosphotungstic acid has the molecular formula H5O41PW12 and a molecular weight of 2898.1 g/mol.

Which grade and pack sizes of Phosphotungstic acid can I order?

We supply Phosphotungstic acid, in 25 g, 100 g, 500 g, 5 kg, 25 kg packs. Larger bulk quantities and custom packing are quoted on request.

Do you provide a COA and SDS with Phosphotungstic acid?

Yes. Every lot of Phosphotungstic 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 Phosphotungstic acid be shipped internationally?

Yes. Phosphotungstic acid is classified as hazardous (UN 3260), 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.