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HomeProduct name listSolvent Red 1

Solvent Red 1

Synonym(s):1-(2-Methoxyphenylazo)-2-naphthol;Oil Red 113

  • CAS NO.:1229-55-6
  • Empirical Formula: C17H14N2O2
  • Molecular Weight: 278.31
  • MDL number: MFCD00046377
  • EINECS: 214-968-9
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2023-06-08 17:06:37
Solvent Red 1 Structural

What is Solvent Red 1?

Chemical properties

Solvent Red 1, also known as Sudan Red G, is a yellowish red lysochrome azo dye. It has the appearance of an odorless reddish-orange powder with melting point 225 °C. It is soluble in fats and used for coloring of fats, oils, and waxes, including the waxes used in turpentine-based polishes. It is also used in polystyrene, cellulose, and synthetic lacquers. It is insoluble in water. It is stable to temperatures of about 100–110 °C. It was formerly used as a food dye, but still appears to be used for this purpose in china. It is used in some temporary tattoos, where it can cause contact dermatitis. It is also used in hair dyes. It is a component of some newer formulas for red smoke signals and smoke-screens, together with Disperse Red 11.

The Uses of Solvent Red 1

Sudan dyes and para red in food. Dyes and metabolites, Environmental Testing.

What are the applications of Application

Sudan red G is a model compound for studying lipophilic small molecules

Preparation

O-Anisidine diazotization, and Naphthalen-2-ol coupling.

General Description

Sudan dyes are classified under the azo dyes group of organic compounds that are commonly utilized as additive materials for industrial and scientific applications.

Safety Profile

An eye irritant. When heated to decomposition it emits toxic fumes of NOx.

Properties and Applications

red to yellow red orange. Appearance is red to yellow red orange powder, the products by glacial acetic acid crystallization melting point 180 ℃. Soluble in boiling ethanol to red. Light fastness is poorer, in 110 ℃ when stability. In concentrated sulfuric acid for deep red, dilution after dark red precipitation. The alcohol solution to join hydrochloric acid for wine red; Add sodium hydroxide as orange. Mainly used in oil, wax and cultural and educational supplies coloring.

Standard Light Fastness Heat-resistant(℃) water Sodium Carbonate(5%) Hydrochloric acid(5%)
Melting point Stable
ISO Poor-General 170-180 100-110 Insoluble No change No change

Properties of Solvent Red 1

Melting point: 179 °C
Boiling point: 421.12°C (rough estimate)
Density  1.1222 (rough estimate)
vapor pressure  0Pa at 25℃
refractive index  1.5500 (estimate)
storage temp.  room temp
solubility  Chloroform (Slightly), Methanol (Very Slightly)
Colour Index  12150
form  neat
pka 13.61±0.50(Predicted)
color  Orange to Brown
Water Solubility  330ng/L at 25℃
BRN  1843558
Stability: Hygroscopic, Light sensitive
CAS DataBase Reference 1229-55-6(CAS DataBase Reference)
EPA Substance Registry System 2-Naphthalenol, 1-[(2-methoxyphenyl)azo]- (1229-55-6)

Safety information for Solvent Red 1

Computed Descriptors for Solvent Red 1

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