Monosodium citrate
CAS 18996-35-5
EC 242-734-6
Formula C6H8O7.Na
MW 214.11 g/mol
Salts & Minerals Food & NutritionPersonal Care & CosmeticsPharmaceuticals & HealthcareWater Treatment Chelation & SequestrationpH Regulation & BufferingAntioxidant & StabilizerFlavoring & Acidulant
Description
Monosodium citrate (CAS 18996-35-5) is the monosodium salt of citric acid, approved as a food additive under E331i. It is also referenced commercially as Citrofluyl and appears in formulation documentation under the abbreviations MSC and E 331i.
In food and beverage manufacturing, monosodium citrate functions as a buffering agent, stabilising pH in dairy analogues and processed cheese by controlling protein interactions during heat treatment. In pharmaceutical formulations, it acts as a chelating agent, binding divalent metal ions to prevent oxidative degradation of active ingredients and extend shelf life.
Monosodium citrate is available in food-grade and pharmaceutical-grade specifications, meeting FCC, Ph.Eur., and E331i regulatory requirements. It is supplied as a white crystalline powder and falls under HS code 29181500. The substance is registered under REACH and is handled in compliance with applicable EU chemical regulations.
In food and beverage manufacturing, monosodium citrate functions as a buffering agent, stabilising pH in dairy analogues and processed cheese by controlling protein interactions during heat treatment. In pharmaceutical formulations, it acts as a chelating agent, binding divalent metal ions to prevent oxidative degradation of active ingredients and extend shelf life.
Monosodium citrate is available in food-grade and pharmaceutical-grade specifications, meeting FCC, Ph.Eur., and E331i regulatory requirements. It is supplied as a white crystalline powder and falls under HS code 29181500. The substance is registered under REACH and is handled in compliance with applicable EU chemical regulations.
Physical Properties
| Melting Point | 212 °C(lit.) |
| Appearance | white crystalline powder |
| Color | White |
| Odor | Odorless |
| Form | Crystalline Powder |
| Water Solubility | Soluble in water. Insoluble in ethanol. |
| pH | 3.5-3.8 (25℃, 50mg/mL in H2O) |
Trade & Regulatory
| HS Code | 29181500 |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 1 |
Other Names
Sodium citrate monobasicsodium 3-carboxy-3,5-dihydroxy-5-oxopentanoateE331iE 331iCitrofluylcitricacid,sodiumsalt
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