| 1,3-Dihydroxyacetone | ||
| Assay: 99% |
Package: 25kg/drum |
MOQ: 1kg |
| CAS：62147-49-3 | MF:C6H12O6 | MW:180.16 |
Test Method 3 Requirements 3.1 Appearance White to pale yellow powder. 3.2 Physical and chemical indicators The physical and chemical indicators of the product should meet the requirements in Table 1. Table 1 Physical and chemical indicators Project Metrics Purity, % (mass fraction) ≥ 98.0 pH value 4.0～6.0 Moisture, % (mass fraction) ≤ 0.5 Ignition residue, % (mass fraction) ≤ 0.1 Iron content, % (mass fraction) ≤ 0.002 3.3 Microbial indicators The microbiological index of the product should meet the requirements in Table 2. Table 2 Microbial indicators 3.4 Limits of Toxic Substances The limit of toxic substances of the product shall comply with the provisions in Table 3. Project Metrics Total number of colonies, cfu/g ≤ 100 Mold and yeast, cfu/g ≤ 100 Fecal coliforms not detectable Pseudomonas aeruginosa Not detected Staphylococcus aureus not detected Escherichia coli, MPN/g Not detectable Salmonella not detected Specification requirements document for technical indicator 1 Table 3 Toxic Substance Limits Project Metrics Arsenic, mg/kg ≤ 10 Lead, mg/kg ≤ 10 Mercury, mg/kg ≤ 1 3.5 Net Content Tolerance Should comply with the provisions of the State Administration of Quality Supervision, Inspection and Quarantine [2005] No. 75. 4 Test methods 4.1 Appearance Do it visually. 4.2 Physical and chemical indicators 4.2.1 General provisions Unless otherwise specified, the reagents and water used in this standard refer to analytical reagents and grade 3 water specified in GB/T 6682-2008. The standard solutions, preparations and products used in the test shall be prepared in accordance with the provisions of GB/T 603-2002 (2004) unless other requirements are specified. The solutions used in this standard are all mass fractions expressed in "%". 4.2.2 Purity Follow the method in Appendix A. 4.2.3 pH value 1g of the sample was dissolved in 20g of water and measured with a precision acidity meter. 4.2.4 Moisture Carry out according to the method of GB/T 6283-2008. 4.2.5 Ignition residues Carry out according to the method of GB/T 7531-2008. 4.2.6 Iron content Carry out according to the method of GB/T 3049-2006. 4.3 Microbial indicators It is carried out according to the method of Part IV of the "Hygienic Standards for Cosmetics" (2007 edition) of the Ministry of Health of the People's Republic of China. Test Method Document for Specification 1 4.4 Hygiene indicators According to the method of the third part of the Ministry of Health of the People's Republic of China "Hygienic Standards for Cosmetics" (2007 edition). 4.5 Net Content Tolerance According to the provisions of JJF 1070-2005. |
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