Ammonium tungstate pentahydrate CAS 1311-93-9

Purity 97%+In StockPharmaceutical Standards
CAS No.1311-93-9
Molecular FormulaW
Molecular WeightN/A
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

Ammonium tungstate pentahydrate CAS 1311-93-9 chemical structure

Description

CATO supplies Ammonium tungstate pentahydrate (CAS 1311-93-9), a certified reference material (molecular formula WH4NH2OO, MW 235.89 g/mol) for analytical method development and quality control.

Owing to an inorganic composition, Ammonium tungstate pentahydrate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 235.89 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.

This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.

As a certified reference material (CRM), Ammonium tungstate pentahydrate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.

Physical & Chemical Properties

Molecular FormulaW 2*H4N 5*H2O 4*O
Molecular Weight235.89 g/mol
Purity97%+
StorageStore at 2-8°C, protect from light
Solubility (reference)Freely soluble in water
StabilityLight-sensitive; avoid direct strong light
CAS Registry Year (est.)1957
Nitrogen Atoms1

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