This standard specifies the requirements, test methods, inspection rules, marking and labeling, as well as packaging, transportation and storage of silica gel type B.
This standard is applicable to the silica gel type B, which is made from sodium silicate and sulfuric acid. The silica gel type B is mainly used as an air humidity regulator, catalyst and carrier, and padding material for pets, as well as raw materials of fine chemicals like chromatography silica gel.
Molecular formula: SiO2?nH2O
2 Normative References
The following documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of these references indicated below. For undated references, the latest edition applies.
GB/T 191-2000 Packaging - Pictorial Marking for Handling of Goods
(eqv ISO 780: 1997)
GB/T 1250 Rules of Rounding Off for Numerical Values & Expression and Judgment of Limiting Values
GB/T 6678 General Principles for Sampling Chemical Products
HG/T 2765.5-2005 Test Method for Silica Gel
3 Classification
In this standard, the silica gel type B is divided into the following two categories:
