This standard specifies the requirements, sampling, test methods, inspection rules and marking, packaging, transportation and storage of CI Pigment Red 48:2. This standard applies to azo products produced by the coupling of 2-amino-4-chloro-5-toluenesulfonic acid diazonium salt and 3-hydroxy-2-naphthoic acid, and processed by calcium salt lake formation and special pigmentation. Dried lake pigments. Products are mainly used in inks, plastics and coatings. This standard sets color, relative tinting power, 105°C volatiles, water-soluble matter, sieve residue, pH value of aqueous suspension, conductivity of water extract, oil absorption, acid resistance, alkali resistance, solvent resistance, heat resistance 15 items including properties, light resistance, dispersion and product safety.