Acid Red 73

Acid Red 73

CAS Number
5413-75-2
Molecular Formula
C22H14N4Na2O7S2
Purity
Acid Red 73 97% purity

About Acid Red 73

Acid Red 73 (CAS 5413-75-2), a prominent sulfonated azo dye, is increasingly sought by US-based high purity fine chemicals distributors for its critical role in the coloration of wool, silk, and nylon textiles where exceptional brilliance and fastness are required. Brilliant Crocein MOO (CAS 5413-75-2) serves as a vita...

Acid Red 73 Specifications

CAS Number
5413-75-2
Molecular Formula
C22H14N4Na2O7S2
Molecular Weight
556.48 g/mol
IUPAC NameORBotanical Name
disodium 7-hydroxy-8-[(E)-{4-[(E)-phenyldiazenyl]phenyl}diazenyl]naphthalene-1,3-disulfonate
Canonical SMILES
C1=CC=C(C=C1)N=NC2=CC=C(C=C2)N=NC3=C(C=CC4=C3C(=CC(=C4)S(=O)(=O)[O-])S(=O)(=O)[O-])O.[Na+].[Na+]
InChI Key
PEAGNRWWSMMRPZ-RVTJCSDESA-L
Molecular Weight
556.48 g/mol
Purity
Acid Red 73 97% purity
Physical appearance
Yellow light red powder

Textile Dye

A synthetic azo dye primarily used for the coloration of protein-based fibers such as wool and silk, as well as cotton and nylon, providing high-intensity red shades with good color fastness

Histological Counterstain

A versatile anionic dye employed in laboratory research as a counterstain for cytoplasm, muscle, and connective tissue in tissue sections to contrast with blue hematoxylin-stained nuclei

Cosmetic Colorant

A specialized red dye used in the formulation of personal care products, including lipsticks, hair dyes, and soaps, to impart vivid red pigmentation

Industrial Colorant

A functional additive used in the paper, leather, and plastics industries for surface staining and bulk coloration to achieve brilliant red finishes.

Acid Red 73 FAQs

Minimum Order Quantity

25 kg (evaluation) · 1 MT (commercial)

Lead Time

3 – 5 weeks estimated

Delivery Terms

FOB*

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

US Availability

US Facility Inventory

Documentation

US SDS · COA · TDS · Specification sheet

US Regulatory & Quality Information

TSCA status*

US SDS / HazCom*

GHS classification*

ISO 9001:2015 site*

DOT shipping classification*

FDA status*

EPA status*

California Prop 65*

Reliable US supply chain

Regulatory compliance

On-time delivery

Technical expert support

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