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柠檬酸 有一水柠檬酸与无水柠檬酸两种规格，主要用于食品、饮料行业作为酸味剂、调味剂及防腐剂、保鲜剂。还在化工行业、化妆行业及洗涤行业中用作抗氧化剂、增塑剂、洗涤剂等。
Product characteristics and USES
Citric acid
With citric acid and anhydrous citric acid monohydrate two specifications, mainly used in food and beverage industry as sour agent, flavouring agent, preservative and antistaling agent. Also in the chemical industry, cosmetic industry and used as antioxidant, plasticizer and detergent in the washing industry, etc.
Citric acid monohydrate quality standards
project unit BP 2009 USP 32 The FCC 6 E 330 GB1987-2007
character
White crystal powder, colorless crystal or granule
Identification test
Conform to the test
Color & clarify degree of solution
Conform to the test Conform to the test / Conform to the test /
content % 99.5 to 100.5 99.5 to 100.5
moisture % 7.5 to 9.0 7.5 to 9.0 8.8 or less 7.5 to 8.8 7.5 to 9.0
Light transmittance % / / / / 95 or more
Calcium salt Parts per million (PPM) / / / 75 or less 200 or less
Iron salts Parts per million (PPM) / / / 5 or less 5 or less
arsenic Parts per million (PPM) / / / 1 or less 1 or less
mercury Parts per million (PPM) / / / 1 or less /
The heavy metal Parts per million (PPM) 10 or less 10 or less / 5 or less /
Oxalic acid salt Parts per million (PPM) 360 or less 360 or less Conform to the test 100 or less 100 or less
chloride Parts per million (PPM) / / / / 50 or less
sulfate Parts per million (PPM) 150 or less 150 or less / 150 or less 150 or less
Easy carbon compounds
Not deeper than the standard Not deeper than the standard Conform to the test Conform to the test 1.0 or less
Sulphated ash % 0.1 or less 0.1 or less 0.05 or less 0.05 or less 0.05 or less
Organic volatile impurities
/ / Conform to the test
Three laurylamine Mg/kg / / 0.1 or less
Lead (pb) Parts per million (PPM) / / 0.5 or less 0.5 or less 0.5 or less
aluminum Parts per million (PPM) 0.2 or less 0.2 or less / / /
Bacterial endotoxin IU/mg < 0.5 Conform to the test / / /
Water insolubles
/ / / / Filtering time is less than 1 min,
Membrane filter basic don't change color,
Visual noise can be seen
No more than three
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