product characters：white crystalline powders, colorless crystals or granules
executive standards：bp/usp/fcc/e330/gb1886.235-2016
packaging ：25kg net composite paper-plastic bag or 3-ply kraft paper bag with pe liner,form-fill-seal heavy packaging pe bags；500kg or 1000kg net pp woven jumbo bag with pe liner
storage：kept in a clean,dry,well-ventilated place
main usage：citric acid is mainly used as acidulant, flavoring agent, preservative and antistaling agent in food and beverage industry, it is also used as antioxidant, plasticizer and detergent in chemical, cosmetics and cleaning industries.
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| item | unit | bp | usp | fcc | e330 | gb1886.235-2016 | ensign |
| characters | / | white crystalline powders,colorless crystals or granules.odorless, has a strongly acid taste. | |||||
| identification | / | pass test | |||||
| color & clarity of solution | / | pass test | pass test | / | / | / | pass test |
| assay | % | 99.5-100.5 | 99.5-100.5 | 99.5～100.5 | ≥99.5% | 99.5-100.5 | 99.5-100.5 |
| water | % | ≤1.0 | ≤1.0 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 |
| readily carbonisable substances | / | not darker than standard | not darker than standard | a≤0.52，t≥30% | not darker than standard | ≤1.0 | not darker than standard or a≤0.52，t≥30% |
| sulphated ash | % | ≤0.1 | ≤0.1 | ≤0.05 | ≤0.05 | ≤0.05 | ≤0.05 |
| sulphate | ppm | ≤150 | ≤150 | / | / | ≤100 | ≤50 |
| chloride | ppm | / | / | / | / | ≤50 | ≤5 |
| oxalate | ppm | ≤360 | ≤360 | ≤100 | ≤100 | ≤100 | ≤50 |
| calcium | ppm | / | / | / | / | ≤200 | / |
| aluminum | ppm | ≤0.2 | ≤0.2 | / | / | / | ≤0.2 |
| arsenic | ppm | / | / | / | ≤1 | ≤1 | ≤0.1 |
| lead | ppm | / | / | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.1 |
| mercury | ppm | / | / | / | ≤1 | / | ≤0.1 |
| heavy metals | ppm | / | / | / | / | / | ≤5 |
| bacterial endotoxins | iu/mg | ＜0.5 | pass test | / | / | / | ＜0.5 |
| tridodecylamine | mg/kg | / | / | ≤0.1 | / | / | / |