AMMONIUM CITRATE

PRODUCT IDENTIFICATION

CAS NO. 3012-65-5

AMMONIUM CITRATE

EINECS NO. 221-146-3
FORMULA (NH4)2C6H6O7
MOL WT. 226.19

HS CODE

291815
TOXICITY  
SYNONYMS Diammonium citrate; Ammonium Citrate;
Citric acid diammonium salt; 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, Diammonium Salt;
DESCRIPTION  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE White granules or powder with Slight ammonia odor
MELTING POINT Decomposes
BOILING POINT  
SPECIFIC GRAVITY 1.48
SOLUBILITY 100 gm/100 gm in water
pH 4.5 - 5.5 (5% Solution)
VAPOR DENSITY  
AUTOIGNITION

 

NFPA RATINGS Health: 2; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 

FLASH POINT

 

STABILITY Stable under ordinary conditions

APPLICATIONS

Buffer, Electronics, Concrete Cleaning
SALES SPECIFICATION

APPEARANCE

White granular with Ammonia odor
ASSAY

97.5% min

RESIDUE ON IGNITION

0.1% max

pH ( 5% SOLUTION)

4.5 - 5.5

SULFATE

0.02% max

CHLORIDE

0.002% max

PHOSPHATE

0.001% max

IRON

0.001% max

HEAVY METALS

0.001% max

TRANSPORTATION
PACKING  
HAZARD CLASS 9.2
UN NO. 9087
OTHER INFORMATION
Hazard Symbols: XI, Risk Phrases: 36/37/38, Safety Phrases: 24/25

GENERAL DESCRIPTION OF CITRIC ACID

Citric Acid (2-Hydroxy-1,2,3-propanetricarboxylic acid, in IUPAC naming) is a colourless crystalline organic compound belong to carboxylic acid family. It exists in all plants (especially in lemons and limes) and in many animal tissues and fluids. In biochemistry, it is involved in important metabolism of almost all living things; the Krebs cycle (also called citric acid cycle or tricarboxylic acid cycle), a part of the process by which animals convert food to energy. Citric acid works as a preservative ( or as an antioxidant) and cleaning agent in nature. It is commercially obtained by fermentation process of glucose with the aid of the mold Aspergillus niger and can be obtained synthetically from acetone or glycerol. It can be used as an sour taste enhancer in foods and soft drinks. The three carboxy groups lose protons in solution; resulting in the excellent pH control as a buffer in acidic solutions. It is used as a flavouring, stabilizing agent and acidulant (to control acidity) in food industry, in metal-cleaning compositions as it chelates metals. Citric acid is available in forms of anhydrous primarily and in monohydrate, the crystallized form from water. The hydrated form will be converted to the anhydrous form above 74 C. Citrate is a salt or ester of citric acid. Citrates are formed by replacing the acidic one, two, or all three of the carboxylic hydrogens in citric acid by metals or organic radicals to produce an extensive series of salts, esters, and mixed (solid) salts. Cirrates are used in food, cosmetics, pharmaceutical and medicine industries as well as in plastic industry; nutrient or food additives having functions of acidity regulator, sequestering and stabilizing agent, antioxidants synergist, firming agent; anticoagulant for stored whole blood and red cells and also for blood specimens as citrates chelate metal ions and saline cathartics, effervescent medicines; high boiling solvent, plasticizer and resin for food contact plastics.