1934-21-0 Usage
Description
Acid Yellow 23, also known as Tartrazine, is a synthetic azo dye commonly used in various industries due to its vibrant yellow color. It is soluble in water, slightly soluble in ethanol, and soluble in fiber, but insoluble in other organic solvents. Acid Yellow 23 exhibits good stability to changes in pH, light, and heat, making it a popular choice for coloring applications.
Uses
Used in Textile Industry:
Acid Yellow 23 is used as a dye for wool and silk, providing a vibrant yellow color to these fibers.
Used in Food Industry:
Acid Yellow 23 is used as a colorant in the food industry, adding a yellow hue to desserts, candy, preserves, beverages, prepared meats, and canned and frozen vegetables.
Used in Pharmaceutical Industry:
Acid Yellow 23 is utilized as a colorant in the pharmaceutical industry, contributing to the visual appeal of drugs and medications.
Used in Cosmetics Industry:
This dye is also used in the cosmetics industry to add color to various products, such as soaps and other personal care items.
Used in Biochemistry:
Acid Yellow 23 serves as an adsorption-elution indicator for chloride estimations in biochemistry.
Used in Paper, Leather, and Plastic Industries:
The barium salt of Acid Yellow 23 is used for shading in the paper, leather, and plastic industries, providing a consistent yellow color to these materials.
Preparation
Commonly known??Tartmzine ?. (a) 4-Aminobenzenesulfonic acid diazo, and 5-Oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazole-3-carboxylic acid coupled; (b) 2 Moore 4-Aminobenzenesulfonic acid?and dioxide 5 diacid reaction
World Health Organization (WHO)
Tartrazine is widely used as a permitted colouring agent in food and pharmaceutical preparations. Its use has been associated with allergic
reactions some of which have been severe. Several national drug regulatory
authorities now require a warning on labels of products containing tartrazine and
some manufacturers have voluntarily withdrawn this compound from their
products.
Hazard
An allergen.
Flammability and Explosibility
Nonflammable
Safety Profile
Low toxicity by
ingestion. Mutation data reported. When
heated to decomposition it emits very toxic
fumes of NOx, SOx, and Na2O.
Toxicology
This coloring agent is 5-hydroxy-1-p-sulfophenyl-4-(p-sulfophenylazo)- pyrazol-3-carboxylic acid, trisodium salt. It is a yellow powder and has been used as food coloring additive since 1916. Tartrazine is known as the least toxic coloring agent among synthetic coloring chemicals. The median acute oral lethal dose of tartrazine in mice is 12.17 g/kg. Beagle dogs received tartrazine as 2% of the diet for two years without adverse effects, with the possible exception of pyloric gastritis in one dog. Tumor incidence was unchanged relative to controls, in rats receiving tartrazine at 1.5% of the diet for 64 weeks, and in rats administered this dye at 5.0% of the diet for two years.
Human sensitivity to tartrazine has been reported with some frequency
and has been estimated to occur in 1/10,000 persons. Anaphylactic shock,
potentially life-threatening, has been reported but symptoms more commonly
cited are urticaria (hives), asthma, and purpura (blue or purple spots on the skin
or mucous membrane).
Standard
Light Fastness
Fading
Stain
ISO
4
AATCC
4
Check Digit Verification of cas no
The CAS Registry Mumber 1934-21-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,3 and 4 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1934-21:
(6*1)+(5*9)+(4*3)+(3*4)+(2*2)+(1*1)=80
80 % 10 = 0
So 1934-21-0 is a valid CAS Registry Number.
InChI:InChI=1/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,21H,(H,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;;
