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Standards GB - Chinese national standards - Page 5725
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
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GB 1259-1989
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Working chemical Potassium dichromate
WITHDRAWN published on 1.3.1989
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GB/T 12590-1990
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Chemical reagent—n-Butanol
WITHDRAWN published on 18.12.1990
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GB/T 12591-1990
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Chemical reagent--Diethyl ether
WITHDRAWN published on 1.1.1990
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GB/T 12592-1990
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Chemical reagent—Bromophenol Blue
WITHDRAWN published on 18.12.1990
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GB 12593-1990
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Working chemical—Ethylenediaminetetraacetic acid disodium salt
WITHDRAWN published on 18.12.1990
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GB 12594-1990
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Working chemical—Potassium bromate
WITHDRAWN published on 18.12.1990
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GB 12595-1990
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Working chemical—Silver nitrate
WITHDRAWN published on 18.12.1990
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GB 12596-1990
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Working chemical—Calcium carbonate
WITHDRAWN published on 18.12.1990
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GB 12597-1990
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Working chemical—Benzoic acid
WITHDRAWN published on 18.12.1990
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GB/T 12598-1990
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Ion exchange resins--Determination for strength--Osmotic-attrited method
WITHDRAWN published on 1.1.1990
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