Acid red 27 ≥85-95% (dye content), Sigma-Aldrich®

Supplier: SIGMA-ALDRICH MICROSCOPY
Warning

Synonyms: Amaranth, Sodium 3-hydroxy-4-((4-sulphonatonaphthalen-1-yl)diazenyl)naphthalene-2,7-disulphonate, Bordeaux S, Food Red No. 2, Azo Rubine S, Wool Red 40 F, Naphthol Red

M-Clarity™ quality level = MQ200

A1016-100G A1016-500G A1016-50G
A1016-100GEA 129 GBP
A1016-100G A1016-500G A1016-50G
Acid red 27 ≥85-95% (dye content), Sigma-Aldrich®
Acid red 27

Amaranth has been used as a dye for the microscopic visualization of crop contraction in blowflies. It has been used in the electrophoresis gel to track the migration front of the electrode buffer.


Amaranth is an azo dye which is mainly used in the the beverage and food industries. It is also considered as an endocrine disruptor.

Formula: C₂₀H₁₄N₂O₁₀S₃
MW: 604,46 g/mol
Melting Pt: >350 °C (at 966,25 hPa)
Flash Pt: 214 °C (closed cup)
Storage Temperature: Room Temperature
MDL Number: MFCD00004076
CAS Number: 915-67-3
EINECS: 213-022-2

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Specification Test Results

Appearance (Colour) Brown to Red-Brown
Appearance (Form) Powder
Proton NMR Spectrum Conforms to Structure
Solubility (Turbidity), 10 mg/ml, H2O Clear
Loss on Drying, 3.5 mol/mol ≤9.4%
Nitrogen (Dry Basis) 3.9 - 4.6%
% Dye content, Dry Basis 85 - 95%
Recommended Retest Period 6 Years

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