| Assay: 99%
|| Package: 25kg/drum
|| MOQ: 1kg
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
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.
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
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  No. 75.
4 Test methods
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 "%".
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.
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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