Amaranth

CAS Number
915-67-3
EC Number
213-022-2
Chemical Formula
C20H14N2O10S3.3Na
Molecular Weight
604.5 g/mol
E Number
E123

Description

Amaranth (CAS 915-67-3), also known as E123 and Red No. 2, is a synthetic azo dye producing a deep red-to-maroon hue across a range of industrial and food applications. It functions as a colorant in formulations where consistent, stable red coloration is required at controlled concentrations. In the textile and leather industries, it is used to dye natural and synthetic fibers.

The dye delivers uniform color uptake in batch and continuous dyeing processes. Ink formulators incorporate it into printing inks for packaging applications where vivid red shades and dye solubility are process requirements. In food and beverage manufacturing, where permitted by regional regulation, it colors products such as caviar, certain alcoholic drinks, and fish roe. Paper manufacturers use it to achieve consistent red tones.

The product is utilized in decorative and specialty paper grades to ensure visual uniformity. Amaranth is supplied as a fine dark red to brown powder for various industrial and commercial manufacturing needs. It is available in food-grade specification meeting E123 purity standards, as well as technical grade for textile and industrial use. Dye content is a key specification buyers should confirm during procurement.

Commercial grades typically vary in active dye concentration depending on the intended application. This versatility makes it a staple for manufacturers requiring reliable red pigmentation in diverse chemical environments.

Other Names (Synonyms)

Red number two|Red number 2|Red num 2|Red No 2|Red dye number two|Red dye number 2|Red dye #two|Red dye #2|E123

Key Technical Features

  • High Purity Grade standard
  • Consistent Batch Quality
  • Full Regulatory & REACH Support
  • Global Logistics Network enabled

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Physical Properties

Melting Point >300°C
Density ~1.50 g/cm³ (approx)
Flash Point 214°
Appearance solid
Color Dark reddish-brown to dark brown
Form Crystalline Powder
Water Solubility 50 g/L (20 ºC)
pH 9.65 (28°C, - OECD Test Guideline 122 - alkaline)
Log P -5.13

Safety & Handling (Learn More)

Warning
GHS07· Irritant

Hazard Statements

H315 Causes skin irritation
H319 Causes serious eye irritation
H335 May cause respiratory irritation

Precautionary Statements

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P264 Wash … thoroughly after handling.
P271 Use only outdoors or in a well-ventilated area.
P280 Wear protective gloves/protective clothing/eye protection/face protection.
P319 Get medical advice/attention if you feel unwell.
P321 Specific treatment (see … on this label).
P405 Store locked up.
P501 Dispose of contents/container in accordance with local regulations.
P264+P265 Wash … thoroughly after handling.
P302+P352 IF ON SKIN: Wash with plenty of water.
P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P332+P317 Get emergency medical help.
P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help.
P362+P364 Take off contaminated clothing and wash it before reuse.
P403+P233 Store in a well-ventilated place. Keep container tightly closed.
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.

Trade & Regulatory

HS Code 32129000
Storage Class 11 - Combustible Solids
WGK (Germany) 3

Documentation

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