GB 1886.375-2024 English PDF (GB1886.375-2024)

This standard applies to the food additive calcium hydroxide, which is made by digesting calcium oxide as raw material, OR the food additive calcium hydroxide, which is made by calcining limestone or oyster as raw material into calcium oxide and then digesting it. 2 Chemical name, molecular formula, relative molecular mass 2.1 Chemical name Calcium hydroxide 2.2 Molecular formula Ca (OH)2 2.3 Relative molecular mass 74.09 (according to 2018 international relative atomic mass) 3 Technical requirements 3.1 Sensory requirements Sensory requirements shall comply with the provisions of Table 1. Table 1 -- Sensory requirements Item Requirements Inspection methods Color White Take an appropriate amount of specimen; place it in a 50 mL beaker; observe it under natural light State Powder 3.2 Physical and chemical indicators The physical and chemical indicators shall comply with the provisions of Table 2. GB 1886.375-2024 www.ChineseStandard.net  Buy True-PDF  Auto-delivery. Page 5 of 13 Table 2 -- Physical and chemical indicators Item Indicators Inspection methods Calcium hydroxide [Ca(OH)2] content, w/% ≥ 95.0 A.4 in Appendix A Loss on drying, w/% ≤ 1.0 A.5 in Appendix A Acid-insoluble matter, w/% ≤ 0.1 A.6 in Appendix A Carbonate Pass test A.7 in Appendix A Magnesium and alkali metals, w/% ≤ 2.0 A.8 in Appendix A Barium (Ba), w/% ≤ 0.03 A.9 in Appendix A Fluorine (F)/(mg/kg) ≤ 50.0 GB/T 5009.18 Lead (Pb)/(mg/kg) ≤ 2.0 A.10 in Appendix A Total arsenic (calculated as As)/(mg/kg) ≤ 2.0 A.11 in Appendix A Heavy metals (calculated as Pb)/(mg/kg) ≤ 10 GB 5009.74 Sieve residue (0.045 mm), w/% ≤ 0.4 A.12 in Appendix A GB 1886.375-2024 www.ChineseStandard.net  Buy True-PDF  Auto-delivery. Page 6 of 13 Appendix A Testing method A.1 Warning Some reagents used in the test methods of this standard are toxic or corrosive and shall be handled with caution. If necessary, it shall be carried out in a fume hood. If it splashes on the skin or eyes, rinse immediately with plenty of wat...