GB/T 23670-2025 CLT acid(2-Amino-4-methyl-5-chlorobenzenesulfonic acid)

GB/T 23670-2016 2-Amino-5-chloro-4-methylbenzenesulfonic acid(CLT acid)

GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions GB/T 601-2016 Chemical reagent—Preparations of reference titration solutions GB/T 603-2002 Chemical reagent—Preparations of reagent solutions for use in test methods GB/T 603-2023 Chemical reagent—Preparations of reagent solutions for use in test methods GB/T 2381-1994 Determination of content of insoluble matters in dyestuffs GB/T 2381-2006 Dyestuffs and intermediate of dyestuffs—Determination of content of insoluble matters GB/T 2381-2013 Dyestuffs and intermediate of dyestuffs—Determination of content of insoluble matters GB/T 2386-2014 Dyestuffs and intermediate of dyes—Determination of moisture content GB/T 3049-1986 Chemical products for industrial use—General method for determination of iron content—o-Phenanthroline spectrophotometric method GB/T 3049-2006 Chemical products for industrial use—General method for determination of iron content—1,10-Phenanthroline spectrophotometric method GB/T 6678-2003 General principles for sampling chemical products GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values GB 20814-2006 Limit and determination of the quantity of 10 heavy-metal elements in dye products GB 20814-2014 Limit and determination of the quantity of heavy-metal elements in dye products GB/T 21876-2008 Solvent dyes and intermediate of dyes—Determination of ash content GB/T 21876-2015 Solvent dyes and intermediate of dyes—Determination of ash content