Monosodium Citrate Powder

• Buffering Agent: Helps regulate and stabilize pH in aqueous formulations.

• High Water Solubility: Freely soluble in water.

• Food and Beverage Applications: Used as an acidity regulator and formulation ingredient in suitable grades.

• Pharmaceutical Applications: Used in selected pharmaceutical formulations.

• Sequestrant Properties: Helps bind certain metal ions in formulated products.

• Multiple Supply Forms: Anhydrous and monohydrate grades may be available.

• Custom Purity Grades: FCC, food, pharmaceutical, and industrial specifications, subject to availability.

• Quality Documentation: COA, SDS, and analytical specifications may be requested.

Property	Specification
Product Name	Monosodium Citrate Powder
Chemical Name	Monosodium Citrate
Alternative Names	Sodium Dihydrogen Citrate, Monobasic Sodium Citrate
Chemical Formula (Anhydrous)	C₆H₇NaO₇
Chemical Formula (Monohydrate)	C₆H₇NaO₇·H₂O
CAS Number	18996-35-5
Molecular Weight (Anhydrous)	214.11 g/mol
Molecular Weight (Monohydrate)	232.23 g/mol
E Number	E331(i)
Appearance	White crystalline powder or colorless crystals
Odor	Odorless
Taste	Slightly acidic
Assay	Typically 99%–101% on an anhydrous basis under applicable food-additive specifications
pH	Approximately 3.4–3.8 in a 1% aqueous solution
Water Solubility	Freely soluble
Ethanol Solubility	Practically insoluble
Loss on Drying	Grade- and hydration-dependent
Functional Classification	Buffering agent, acidity regulator, sequestrant
Available Grades	Food grade, FCC, pharmaceutical, and industrial
Available Forms	Anhydrous powder, monohydrate powder, and crystalline form
Packaging	Standard bags or customized bulk packaging, subject to availability

• Food Grade Monosodium Citrate: For suitable food and beverage formulations requiring pH regulation and buffering.

• FCC Grade Monosodium Citrate: Manufactured and tested against applicable Food Chemicals Codex specifications.

• Pharmaceutical Grade Monosodium Citrate: For qualified pharmaceutical formulation requirements.

• Industrial Grade Monosodium Citrate: For selected chemical processing and industrial formulations.

• Anhydrous Monosodium Citrate: Water-free form with molecular weight of 214.11 g/mol.

• Monosodium Citrate Monohydrate: Hydrated form with molecular weight of 232.23 g/mol.

• Custom-Specification Monosodium Citrate: Purity, moisture content, particle size, packaging, and quality requirements evaluated according to the RFQ.

1. What is monosodium citrate powder?

Monosodium citrate is the monosodium salt of citric acid, also known as sodium dihydrogen citrate. It is commonly used as a buffering agent, acidity regulator, and sequestrant.

2. What is the CAS number for monosodium citrate?

The CAS Registry Number is 18996-35-5. Its anhydrous chemical formula is C₆H₇NaO₇, with a molecular weight of approximately 214.11 g/mol.

3. What is the difference between anhydrous and monohydrate monosodium citrate?

Anhydrous monosodium citrate does not contain water of crystallization and has a molecular weight of 214.11 g/mol. Monohydrate monosodium citrate contains one water molecule per formula unit and has a molecular weight of 232.23 g/mol.

4. What is monosodium citrate powder used for?

Common uses include food and beverage formulation, pharmaceutical products, pH buffering, acidity regulation, metal-ion sequestration, and specialty chemical manufacturing.

5. Is monosodium citrate the same as trisodium citrate?

No. Monosodium citrate contains one sodium ion per citrate molecule, while trisodium citrate contains three. Their chemical formulas and acidity characteristics are different. Always confirm the required sodium citrate form before purchasing.

6. Can REG Metals supply bulk monosodium citrate powder with a COA?

REG Metals can assist with sourcing monosodium citrate in bulk and customized quantities. A COA, SDS, purity analysis, and grade-specific technical documentation can be requested, subject to supplier availability.