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Pigments & Colorants

Amaranth

CAS: 915-67-3

Overview

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.

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Physical Properties

Melting Point>300°C
Density~1.50 g/cm³ (approx)
Flash Point214°
Appearancesolid
ColorDark reddish-brown to dark brown
FormCrystalline Powder
Water Solubility50 g/L (20 ºC)
pH9.65 (28°C, - OECD Test Guideline 122 - alkaline)
Log P-5.13

Safety & Handling

Warning GHS07 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 Code32129000
Storage Class11 - Combustible Solids
WGK (Germany)3

Other Names

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

Related Products

Chemical Properties

CAS Number
915-67-3
EC Number
213-022-2
Mol. Weight
604.5
HS Code
32129000

Industries

Documentation