Description

Disodium Hydrogen Citrate Sesquihydrate is a high-purity, water-soluble salt of citric acid, widely recognized for its superior buffering and chelating properties. This compound is essential for applications requiring precise pH control and metal ion sequestration in sensitive formulations. It serves as a critical ingredient for manufacturers in the pharmaceutical, food & beverage, and personal care industries, where consistent quality and regulatory compliance are paramount.

Application

• Pharmaceutical Buffer & Stabilizer: Used in parenteral solutions, tablet formulations, and diagnostic reagents to maintain stable pH.
• Food Additive (E331(ii)): Functions as an acidity regulator, emulsifier, and preservative in beverages, dairy products, and jellies.
• Personal Care & Cosmetics: Acts as a pH adjuster and chelating agent in creams, lotions, and hair care products.
• Industrial Cleaning & Chelation: Effective in descaling agents and detergent formulations for binding calcium and magnesium ions.
• Biochemical & Molecular Biology: Employed in buffer systems for cell culture media and various enzymatic assays.
• Photographic Industry: Utilized in developing and fixing solutions as a sequestering agent.

Basic Information

Product Name	Disodium Hydrogen Citrate Sesquihydrate
CAS No.	6132-05-4
Molecular Formula	C6H6Na2O7 · 1.5H2O
Molecular Weight	263.10 g/mol (Sesquihydrate)
Synonyms	Disodium Citrate Sesquihydrate; Sodium Citrate Dibasic Sesquihydrate; Citric Acid Disodium Salt Sesquihydrate; E331(ii); 2-Hydroxy-1,2,3-propanetricarboxylic Acid Disodium Salt Sesquihydrate; Disodium 2-Hydroxypropane-1,2,3-tricarboxylate Sesquihydrate; NSC 185721
EINECS	200-675-3

Quality Control

Our Disodium Hydrogen Citrate Sesquihydrate is manufactured under strict quality management systems. It can be produced to meet various pharmacopeial standards, including USP, EP, BP, and FCC grades, ensuring suitability for pharmaceutical, food, and high-purity industrial applications. Every batch is supported by a comprehensive Certificate of Analysis (COA) detailing purity, identity, and safety parameters, available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); the original container must be kept tightly sealed to prevent absorption of atmospheric moisture and caking.

Specification

Item	Specification
Appearance	White or almost white crystalline powder
Identification (IR)	Conforms
Assay (on dried basis)	99.0% - 101.0%
pH (5% solution)	4.8 - 5.2
Loss on Drying	10.0% - 13.0%
Water (Karl Fischer)	10.0% - 13.0%
Heavy Metals (as Pb)	≤ 10 ppm
Chloride (Cl)	≤ 50 ppm
Sulfate (SO4)	≤ 150 ppm
Oxalate	Passes test
Readily Carbonizable Substances	Passes test

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.