The quality standards of Ammonium Metatungstate Hydrate mainly cover the following aspects:
Chemical composition of ammonium metatungstate hydrate
Molecular formula of ammonium metatungstate hydrate
H28N6O41W12 (or abbreviated as HN₆OW)
CAS number of ammonium metatungstate hydrate
12333-11-8
Molecular weight of ammonium metatungstate hydrate
2974.32000
Precise mass of ammonium metatungstate hydrate
2975.44000
PSA of ammonium metatungstate hydrate
603.47000
Physical properties of ammonium metatungstate hydrate
Appearance of Ammonium metatungstate hydrate
White to off-white powder
Melting point of ammonium metatungstate hydrate
100ºC (dec.)(lit.)
Solubility of Ammonium Metatungstate Hydrate
Ammonium metatungstate water-soluble white crystalline powder or slightly yellow, soluble in water.
Purity and impurity of Ammonium metatungstate hydrate
The purity requirement of Ammonium Metatungstate Hydrate products will be different according to different applications. For example, high purity Ammonium Metatungstate Hydrate is usually required in applications such as the manufacture of petrochemical catalysts.
Impurities and particle size distribution in the raw material should be controlled to ensure that the chemical composition and particle size distribution of the product meet the requirements.
Packing and Storage of Ammonium Metatungstate Hydrate
Package of ammonium metatungstate hydrate
It is usually packed in inner double-layer plastic bag and outer iron drum, and the net weight of each drum is usually 50kg or 25kg.
Storage conditions of ammonium metatungstate hydrate
Store at room temperature, avoid direct sunlight and high temperature.
Safety information of Ammonium metatungstate hydrate
Hazard class code for ammonium metatungstate hydrate
R22
Hazard symbol of ammonium metatungstate hydrate
Xn
Warning statement for ammonium metatungstate hydrate
p280; p305 + p351 + p338
National standards for ammonium metatungstate hydrate
Chinese national standard GB/T 3207-2016 specifies the requirements, test methods, inspection rules, marking, packaging, transportation, storage and quality certificate of ammonium metatungstate.
Quality control in the production process of ammonium metatungstate hydrate
Raw material control of ammonium metatungstate hydrate
Adopt high quality ammonium paratungstate (APT) as raw material, control impurities and particle size distribution in raw material.
Process control of ammonium metatungstate hydrate
Formulate reasonable production process and technical parameters, such as pH value, temperature, reaction time, etc., to ensure the product has good chemical reaction and conversion rate.
Process testing of ammonium metatungstate hydrate
Quality inspection and control in the production process, such as particle size distribution, bulk density, moisture and other indicators of the test, timely detection and problem solving.
Equipment selection of ammonium metatungstate hydrate
Selection of suitable production equipment, such as reactor, filter, dryer, etc., to ensure that the product is free from pollution and damage in the production process.
Above are the main aspects about the quality standards of ammonium metatungstate hydrate, which ensure the quality and performance of the product and also help to protect the environment and human health.
More details of ammonium metatungstate product, please visit website: http://ammonium-metatungstate.com/
Please contact CHINATUNGSTEN for inquiry and order of ammonium metatungstate:
Email: sales@chinatungsten.com
Tel.: 86 592 5129595
