Description

Peri Acid CAS NO 82-75-7 is a high-purity organic chemical intermediate, specifically a naphthylamine sulfonic acid derivative. This compound is valued for its role as a critical coupling component in the synthesis of azo dyes and pigments. It is essential for manufacturers in the dye and pigment industries seeking to produce vibrant, colorfast reds, oranges, and related hues. Our supply ensures consistent quality and reliable availability for global industrial applications.

Application

• Primary intermediate for the production of azo dyes and pigments, particularly for red and orange shades.
• Key component in the manufacture of reactive dyes used for coloring cotton and other cellulose fibers.
• Used in the synthesis of acid dyes for wool, silk, and nylon.
• Employed in the production of lake pigments for inks, paints, and plastics.
• Intermediate for specialized optical brighteners and fluorescent agents.
• Research and development chemical for novel organic synthesis and material science.

Basic Information

Product Name	Peri Acid
CAS No.	82-75-7
Molecular Formula	C10H9NO3S
Molecular Weight	223.25 g/mol
Synonyms	1-Naphthylamine-8-sulfonic acid; 8-Amino-1-naphthalenesulfonic acid; 1-Aminonaphthalene-8-sulfonic acid; Peri acid; Peri-acid; 8-Amino-1-naphthalenesulphonic acid; 1,8-Cleve's acid (Note: Often distinguished from 1-Naphthylamine-5-sulfonic acid, Laurent's acid)
EINECS	201-437-3

Quality Control

Our Peri Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets high-purity standards suitable for demanding industrial synthesis. Key parameters including assay, impurity profile, and physical characteristics are verified. A Certificate of Analysis (COA) is provided with each shipment to guarantee traceability and compliance with your specifications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); ensure containers are kept sealed to prevent absorption of atmospheric moisture which may affect quality.

Specification

Item	Specification
Appearance	Off-white to grayish powder or crystals
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.