GB/T 25795-2020C.I. Reactive blue 250 (Reactive blue KN-RGB) (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 25795-2010 "Reaction Blue KN-RGB (CI Reaction Blue 250)". Correspond to GB/T 25795-2010 Compared with the editorial changes, the main technical changes are as follows.

---The standard name was changed to "CI Reaction Blue 250 (Reaction Blue KN-RGB)";

---Revised appearance indicators (see 3.1, 3.1 in 2010 edition);

--- Added color measurement and color light index (see 3.1);

---Modified the moisture index (see 3.1, 3.1 in 2010 edition)

---Modified the control requirements and test methods of hazardous aromatic amines (see 3.1, 5.9, 3.2 and 5.9 of the 2010 edition);

---Modified the appearance evaluation method (see 5.1, 5.1 of the 2010 edition);

---Added the content of dye standard products, modified the dyeing conditions, dyeing formula, shade and intensity evaluation (see 5.2, 2010 edition of 5.2);

--- Increase the allowable difference in the net content of the package (see 7.3).

1 Scope

This standard specifies the requirements, sampling, test methods, inspection rules and signs of CI Reaction Blue 250 (Reaction Blue KN-RGB) products Labeling, packaging, transportation and storage.

This standard applies to the product quality control of CI Reaction Blue 250 (Reaction Blue KN-RGB).

Molecular formula: C27H23N5Na4O20S6

Relative molecular mass: 1021.84 (according to 2019 international relative atomic mass)

CAS Number: 93951-21-4

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB/T 2374-2017 Regulations of general conditions for dye dyeing determination

GB/T 2381-2013 Determination of insoluble matter content of dyes and dye intermediates

GB/T 2386-2014 Determination of moisture in dyes and dye intermediates

GB/T 2387-2013 Determination of shade and intensity of reactive dyes

GB/T 2390 Determination of pH value of dyes

GB/T 2391-2014 Determination of the fixation rate of reactive dyes

GB/T 3671.1-1996 Determination of solubility and solution stability of water-soluble dyes

GB/T 3920-2008 Textile color fastness test color fastness to rubbing

GB/T 3921-2008 Textile color fastness test color fastness to soaping

GB/T 3922-2013 Textile color fastness test Color fastness to perspiration

GB/T 4841.1-2006 Standard Depth Color Card 1/1

GB/T 6152-1997 Textile color fastness test color fastness to heat pressing

GB/T 6678-2003 General Rules for Sampling of Chemical Products

GB/T 6693-2009 Determination of the flying properties of dyestuffs

GB/T 8427-2019 Textile color fastness test Color fastness to artificial light. xenon arc

GB/T 8433-2013 Textile color fastness test Color fastness to chlorinated water (swimming pool water)

GB/T 14576-2009 Textile color fastness test light and perspiration composite color fastness

GB 19601 Limits and determination of 23 harmful aromatic amines in dye products […]