Tartaric Acid USP NF Grade Specifications:
C4H6O6 --- 150.09
Butanedioic acid, 2,3-dihydroxy-;
Butanedioic acid, 2,3-dihydroxy-, [R-(R *,R *)]-;
Tartaric acid; l-(+)-Tartaric acid CAS 526-83-0 & 87-69-4

DEFINITION
Tartaric Acid, dried over phosphorus pentoxide for 3 h, contains NLT 99.7% and NMT 100.5% of C4H6O6.

IDENTIFICATION
A. Identification Tests - General, Tartrate: It meets the requirements.
B. Infrared Absorption.

ASSAY
Procedure
Sample: 2 g of Tartaric Acid, previously dried, in a conical flask
Analysis: Dissolve the Sample in 40 mL of water, add phenolphthalein and titrate with 1 N sodium hydroxide VS. Each mL of 1 N sodium hydroxide is equivalent to 75.04 mg of C4H6O6
Acceptance criteria: 99.7% to 100.5%

Specifications of Tartaric Acid BP Ph Eur Grade
C4H6O6 --- 150.1--- CAS 87-69-4
Ph Eur

DEFINITION
(2R,3R)-2,3-Dihydroxybutanedioic acid.
Content: 99.5 per cent to 101.0 per cent (dried substance).

CHARACTERS
Appearance: White or almost white, crystalline powder or colourless crystals.
Solubility: Very soluble in water, freely soluble in ethanol (96 per cent).

IDENTIFICATION
A. Solution S (see Tests) is strongly acid.
B. It gives the reactions of tartrates.

TESTS
Solution S: Dissolve 5.0 g in distilled water and dilute to 50 ml with the same solvent.
Appearance of solution: Solution S is clear and not more intensely coloured than reference solution.
Specific optical rotation: + 12.0 to + 12.8 (dried substance)
Oxalic acid: Maximum 350 ppm, calculated as anhydrous oxalic acid.
Chlorides: Maximum 100 ppm.
Sulphates: Maximum 150 ppm.
Calcium: Maximum 200 ppm.
Heavy metals: Maximum 10 ppm.
Loss on drying: Maximum 0.2 per cent, determined on 1.000 g by drying in an oven at 105C
Sulphated ash: Maximum 0.1 per cent, determined on 1.0 g.

Specifications of Tartaric Acid FCC Food Grade
L(+)-Tartaric Acid
C4H6O6 Formula wt 150.09
CAS: 87-69-4
FEMA: 3044

DESCRIPTION
Tartaric Acid occurs as colorless or translucent crystals or as a white, fine to granular, crystalline powder. It is stable in air. One gram dissolves in 0.8 mL of water at 25C, in about 0.5 mL of boiling water, and in about 3 mL of alcohol. Its solutions are dextrorotatory.
Function: Acidifier; sequestrant; flavoring agent.

REQUIREMENTS
Identification: A sample solution gives positive tests for Tartrate.
Assay: Not less than 99.7% and not more than 100.5% of C4H6O6 after drying.
Lead: Not more than 2 mg/kg.
Loss on Drying: Not more than 0.5%.
Optical (Specific) Rotation: Between +12.0° and +13.0°.
Oxalate: Passes test.
Residue on Ignition: Not more than 0.05%.
Sulfate: Passes test.

Tartaric Acid Analytical Reagent Grade Specifications
2,3-Dihydroxybutanedioic Acid
HOOC(CHOH)2COOH
Formula Wt 150.0
CAS Number 87-69-4

REQUIREMENTS
Assay: Not less than 99.0%

MAXIMUM ALLOWABLE
Insoluble matter: 0.005%
Residue after ignition: 0.02%
Chloride (Cl): 0.001%
Oxalate (C2O4): Passes test
Phosphate (PO4): 0.001%
Sulfur compounds (as SO4): 0.002%
Heavy metals (as Pb): 5 ppm
Iron (Fe): 5 ppm.