Product Information
Chemical Name Citric acid anhydrous
CAS No. 77-92-9
EINECS 201-069-1Molecular Formula C₆H₈O₇
Molecular Weight 192.12
Synonym 2-hydroxypropane-1,2,3-tricarboxylic acid
Chemphysical Properties
Appearance White crystals or crystalline powder, odorless
Melting Point 153–159 ℃
Solubility Freely soluble in water, soluble in ethanolpH (1% aqueous solution,25℃) 2.2–2.5
Density 1.665 g/cm³
Loss on drying ≤0.5%
Quality Specification
| Test Item | Food Grade (FCC/E330) | USP Grade | BP Grade |
|---|---|---|---|
| Assay (C₆H₈O₇, anhydrous basis) | 99.5 ~ 100.5% | 99.5 ~ 100.5% | 99.5 ~ 100.5% |
| Loss on drying | ≤0.5% | ≤0.5% | ≤0.5% |
| Sulfate | ≤0.01% | ≤0.01% | ≤0.01% |
| Oxalic acid | ≤0.036% | ≤0.036% | ≤0.036% |
| Heavy metals (as Pb) | ≤10 ppm | ≤10 ppm | ≤10 ppm |
| Arsenic | ≤1 ppm | ≤1 ppm | ≤1 ppm |
| Residue on ignition | ≤0.1% | ≤0.1% | ≤0.1% |
| Readily carbonizable substances | Complies | Complies | Complies |
| Identification | Conforms | Conforms | Conforms |
Use & Application
Food grade citric acid anhydrous is widely used in food and beverage production, especially preferred for low-moisture formulations. It acts as acidulant, flavor modifier and metal chelator in powdered drinks, dry mixes, confectionery, bakery products and seasoning powders. It avoids moisture introduction, prevents caking and helps extend shelf life of dry food systems.
USP/BP grade citric acid anhydrous complies with United States Pharmacopeia monograph and British Pharmacopoeia standards for EU and UK pharmaceutical markets. It serves as pharmaceutical excipient for US market formulations, commonly used in effervescent tablets, powder blends, oral suspensions and topical preparations. It functions as pH adjuster, solubilizing agent and chelating agent, with strict impurity control to meet US pharmaceutical GMP requirements.
Packing
25kg kraft paper bag with PE inner liner. Customized packing is available upon request.
Delivery & Storage
Store in cool, dry and well-ventilated warehouse. Keep away from heat, moisture and alkaline materials. Avoid direct sunlight and humid environment to prevent hydration. Shelf life is 24 months under proper storage. Full set export documents can be provided for shipment.
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