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Acid Red 27 Basic information
Product Name: Acid Red 27
Synonyms: AMARANTHAMARANTHAMARANTH;hexacertredno.2;hexacolamaranthbextra;hispacidredam;javaamaranth;kayakuamaranth;Amaranth (Azorubin S);Trisodium-2-hydroxy-1-(4- sulfonato-1- naphthylazo)naphthalene-3, 6-disulfonate
CAS: 915-67-3
MF: C20H11N2Na3O10S3
MW: 604.47
EINECS: 213-022-2
Product Categories: Dyes and Pigments;Organics;Analytical Chemistry;Food Colors by Food Sanitation Law in Japan;Azo
Mol File: 915-67-3.mol
Acid Red 27 Structure
Acid Red 27 Chemical Properties
Melting point  >300°C
density  1.5
solubility  H2O: soluble10mg/mL
Colour Index  16185
form  Crystalline Powder
color  Dark reddish-brown to dark brown
Water Solubility  50 g/L (20 ºC)
λmax 520 nm
Merck  14,375
BRN  4122311
Stability: Stable. Incompatible with strong oxidizing agents.
Biological Applications Detecting membrane-potential change; treating acquired resistance to GABAergic (ARG) agents
InChIKey WLDHEUZGFKACJH-ZRUFZDNISA-K
CAS DataBase Reference 915-67-3
EPA Substance Registry System C.I. Acid Red 27, trisodium salt (915-67-3)
Safety Information
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  36/37/39-26
WGK Germany  3
RTECS  QJ6550000
HS Code  32129000
Hazardous Substances Data 915-67-3(Hazardous Substances Data)
Toxicity LD50 intraperitoneal in mouse: 1gm/kg

Description Amaranth (FD & C Red No. 2) consists essentially of a trisodium 2-hydroxy-l-(4-sulfonato-1-naphthy lazo)naphthalene 3,6-disulfonate and subsidiary coloring matters together with sodium chloride and/or sodium sulfate as the principal uncolored components. Amaranth may be converted to the corresponding aluminum lake.
Chemical Properties solid
Uses Dyeing wool and silk bright bluish-red from an acid bath. Food colorant. As indicator. In color photography.
Definition An azo dye derived from naphthionic and R acids.
World Health Organization (WHO) Approval of amaranth as a permitted colouring agent in foods and pharmaceutical products was withdrawn by the United States FDA in 1976, on the basis of positive findings in carcinogenicity tests which were later disputed on technical grounds and which have not been confirmed in subsequent tests. It has since been withdrawn by some other national regulatory authorities because of uncertainty regarding its safety, but elsewhere it remains widely used.
General Description Dark red to dark purple powder. Almost no odor. Tastes salty. pH (1% solution in water) approximately 10.8. Used to dye wool and silk bright bluish-red from an acid bath.
Air & Water Reactions Can be explosive as an airborne dust at certain concentrations. Moderately soluble in water.
Reactivity Profile Acid Red 27 may form toxic gases with acids, aldehydes, amides, carbamates, cyanides, inorganic fluorides, halogenated organics, isocyanates, ketones, metals, nitrides, peroxides, phenols, epoxides, acyl halides, and strong oxidizing or reducing agents. May form flammable gases with alkali metals. Explosive combination can occur with strong oxidizing agents, metal salts, peroxides, and sulfides.
Hazard A questionable carcinogen. May not be used in foods, drugs, or cosmetics.
Fire Hazard Flash point data for Acid Red 27 are not available; however, Acid Red 27 is probably combustible.
Acid Red 27 Preparation Products And Raw materials
Raw materials Sodium nitrite-->Sodium chloride-->Aluminum chloride-->Phenol-->Aluminum hydroxide-->Aluminum sulfate-->Congo red paper-->Naphthionic acid-->Disodium 2-naphthol-3,6-disulfonate-->Amaranth red aluminium lake-->Sodium 4-amino-1-naphthalenesulfonate
Preparation Products Amaranth red aluminium lake