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H-Acid (1-Amino-8-naphthol-3,6-disulfonic acid) (CAS: 90-20-0)

Name: H-Acid (1-Amino-8-naphthol-3,6-disulfonic acid) (CAS: 90-20-0)
Brand: 99 Exports
SKU: pr2608101644
Price: 5 USD
Availability: InStock

5 Inquiries

Unit Price:

$5-6/KG FOB

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CAS No.:

90-20-0

Grade:

Industrial Grade

Content:

85%

Port:

Ahmedabad

Brand:

99 Exports

Packaging:

25 KG HDPE Drum with Inner Polyliner

Price valid (until):

2026-12-31

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99 Exports

Company Type:

Trader

Location:

India

Qualification:

Main Products:

Iron Polysaccharide Complex,Pigment Blue 15,Reactive Blacks,Reactive Blue,Carbon Black,Benzene

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Product Description
Seller Information
Inquiry History

Description

H Acid

Physical & Chemical Properties

Appearance & Form: Greyish-white to dark grey or brownish powder (or paste form depending on processing).

Solubility: Soluble in alkaline solutions, slightly soluble in water, and practically insoluble in common organic solvents like ethanol or ether.

Assay (Active Content): Typically ranges from 85.0% to 90.0% w/w (Dye intermediate standard).

Molecular Formula: C10H9NO7S2

Molecular Weight: 319.31 g/mol

Quality & Safety Standards

Purity & Grade: High-purity dye intermediate grade meeting strict in-house and industrial manufacturing specifications.

Impurities: Controlled levels of unreacted precursors, inorganic salts, and moisture.

Safety & Handling: Classified as a hazardous chemical. Causes skin irritation, serious eye damage, and potential respiratory irritation. Proper personal protective equipment (PPE)—such as chemical-resistant gloves, eye/face protection, and respiratory dust masks—must be worn during handling.

Recommended Applications

Dye Manufacturing (Dye Intermediates): Widely utilized as a crucial intermediate in the synthesis of various azo dyes and direct/reactive dyes used in the textile industry.

Textile Coloration: Serves as a foundational building block for producing bright and wash-fast colorants for cotton, wool, and silk fabrics.

Items	Specifications
Product Name	H Acid (Dye Intermediate)
C.I. Name	C.I. H Acid
C.I. Number	35570
CAS Number	90-20-0
Chemical Formula	C10H9NO7S2
Molecular Weight	319.31 g/mol
Grade Compliance	Industrial / Dye Intermediate Grade
Appearance / Form	Greyish-white to dark grey or brownish powder.
Solubility	Soluble in alkaline solutions, slightly soluble in water, and practically insoluble in ethanol or ether.
Assay (Purity by Coupling Value)	≥ 80.0% to 90.0%min (Commercial standard up to 94% - 96% active content).
Melting Point	>300oC
Moisture Content	Max 1.0%
Chromotropic Acid	Less than 1.0%
Omega Acid	Less than 5.0%
Water-Insoluble Matter	Max 2.0%
Light Fastness	Derived reactive and acid dyes exhibit good light fastness (typically rating 4–5 or higher on the blue wool scale) when applied to textile fibers.
Alkali Resistance	Derived colorants demonstrate stable fastness properties under alkaline processing and washing conditions.
Acid Resistance	Formulated dyes show good resistance to mild acidic treatments, making them suitable for dyeing wool, silk, and cotton.

Basic Info

Product Name:

H acid

Other Name:

2,7-Naphthalenedisulfonic acid,4-amino-5-hydroxy-;1-Naphthol-3,6-disulfonic acid,8-amino-;4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid;C.I. 35570;1-Amino-8-hydroxy-3,6-disulfonaphthalene;1-Amino-8-hydroxynaphthalene-3,6-disulfonic acid;5-Amino-4-naphthol-2,7-disulfonic acid;8-Amino-1-naphthol-3,6-disulfonic acid;H acid;1-Amino-8-naphthyl-3,6-disulfonic acid;8-Amino-1-hydroxy-3,6-naphthalenedisulfonic acid;1-Hydroxy-8-amino-3,6-naphthalenedisulfonic acid;1-Naphthol-8-amino-3,6-disulfonic acid;3,6-Disulfo-8-hydroxy-1-naphthylamine;1-Hydroxy-8-amino-3,6-disulfonaphthalene;1-Amino-8-naphthol-3,6-disulfonic acid;5-Amino-4-hydroxy-2,7-naphthalenedisulfonic acid;3,6-Disulfo-1-amino-8-naphthol;1-Amino-3,6-disulfo-8-naphthol;Sulfonphthol;NSC 190492;1-Hydroxy-3,6-disulfo-8-aminonaphthalene;8-Hydroxy-3,6-disulfo-1-naphthylamine;1-Amino-8-hydroxynaphthalene-3,6-disulphonic acid;94475-69-1

CAS No.:

90-20-0

Molecular Formula:

C10H9NO7S2

InChIKeys:

InChIKey=APRRQJCCBSJQOQ-UHFFFAOYSA-N

Molecular Weight:

319.31

Exact Mass:

319.31

EC Number:

201-975-7

UNII:

4WUM31ES4U

NSC Number:

190492

DSSTox ID:

DTXSID0046981

HScode:

2922299090

Categories:

Dye

Characteristics

PSA:

171.75000

XLogP3:

-3.45

Appearance:

White to gray-yellow powder

Density:

1.9±0.1 g/cm3

Melting Point:

>300 °C(lit.)

Refractive Index:

1.764

Toxicity:

Reference value: Oral-rat LD50: 6210 mg/kg

Flammability characteristics:

Flammable; burning produces toxic nitrogen oxides and sulfur oxide fumes

See More H acid Properties 

Hazard Identification

Classification of the substance or mixture

Not classified.

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)	No symbol.
Signal word	No signal word
Hazard statement(s)	none
Prevention	none
Response	none
Storage	none
Disposal	none

Other hazards which do not result in classification

no data available

Handling and Storage

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.

See More H acid Safety Data Sheet 

Seller Information

Business Type:
Trader

Main Products:
Iron Polysaccharide Complex,Pigment Blue 15,Reactive Blacks,Reactive Blue,Carbon Black,Benzene

Location:
1 Ram Park, Near Central School, Kalawad Road, Rajkot 360005, India

Payment Terms:
L/C,100% TT in advance

Average lead Time:
25

Total Annual Revenue:
Less than $1 million

Total Employees:
Less than 5

Year of Establishment:
2014

Founded in 2014, 99 Exports has grown from a small startup into a reputable import and export company with a global presence and strong partnerships.

With nearly a decade of experience, we specialize in a wide range of products tailored to meet diverse market demands.

Our dedicated team consists of experienced professionals, each committed to delivering exceptional service and expertise to our clients.

Inquiry History

5 Inquiries

Country	Product	Purchase Quantity	Date Posted
India	1‑Amino‑8‑naphthol‑3,6‑disulphonic acid	25 KG	Mar 19, 2026
India	H Acid	20 MT	Apr 20, 2026
India	1-Amino-8-naphthol-3,6-disulfonic acid	5 KG	Dec 29, 2023
India	1-Amino-8-naphthol-3,6-disulfonic acid	5 KG	Dec 20, 2023
India	Resorcinol	15.00 MT	Aug 29, 2023

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