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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Solutions of methylamines for industrial use--Standard test method
WITHDRAWN published on 1.1.1988
Selected format:Solution of monomethyl amine for industrial use
WITHDRAWN published on 1.1.1988
Selected format:Solution of dimethyl amine for industrial use
WITHDRAWN published on 1.1.1988
Selected format:Solution of trimethyl amine for industrial use
WITHDRAWN published on 1.1.1988
Selected format:-
WITHDRAWN published on 1.1.1988
Selected format:-
WITHDRAWN published on 1.1.1988
Selected format:Difluorochloromethane for tetrafluoroethylene production
WITHDRAWN published on 13.4.1988
Selected format:Trifluorochloromethane
WITHDRAWN published on 13.4.1988
Selected format:Celestite ores--Determination of strontium and calcium contents--EDTA volumetric method
WITHDRAWN published on 1.1.1988
Selected format:Celestite ores--Determination of hygroscopic moisture content--Gravimetric method
WITHDRAWN published on 1.1.1988
Selected format:Latest update: 2025-12-29 (Number of items: 2 253 390)
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