H Acid is an important dye intermediate used primarily in the manufacture of azo dyes, particularly reactive, acid and direct dyes. Chemically known as 1-Amino-8-naphthol-3,6-disulfonic acid, H Acid contains both amino and hydroxyl functional groups along with two sulfonic acid groups, making it an important coupling component in dye synthesis.
As reliable H Acid manufacturers in India, we supply H Acid for dye and dyestuff manufacturing applications with consistent quality, bulk supply capability and export documentation support. Current trade data also shows an active Indian supply base for H Acid dye intermediates.
General Specification
| Parameter | Specification | Result |
|---|---|---|
| Appearance | White to grayish/yellowish powder | White to grayish powder |
| H Acid Purity | NLT 97.0% | 98.20% |
| Moisture | NMT 5.0% | 2.80% |
| Water Insoluble Matter | NMT 0.20% | 0.08% |
| Chromotropic Acid | NMT 1.00% | 0.35% |
| W Acid | NMT 0.40% | 0.18% |
| T Acid | NMT 0.50% | 0.22% |
| K Acid | NMT 0.20% | 0.08% |
| Total Organic Impurities | NMT 3.00% | 1.35% |
| Solubility | Soluble in water | Complies |
Specifications and actual results can vary by manufacturing process and commercial grade. Final specifications should be confirmed against the batch-specific COA. For more detailed specification and technical data please Contact Us.
Technical Specification
| Parameter | Details |
|---|---|
| Product Name | H Acid |
| Chemical Name | 1-Amino-8-naphthol-3,6-disulfonic acid |
| Other Names | 4-Amino-5-hydroxy-2,7-naphthalenedisulfonic acid; 1-Naphthol-8-amino-3,6-disulfonic acid |
| C.I. Number | C.I. 35570 |
| CAS Number | 90-20-0 |
| Molecular Formula | C₁₀H₉NO₇S₂ |
| Molecular Weight | 319.31 g/mol |
| Chemical Class | Naphthalene sulfonic acid dye intermediate |
| Physical Form | Powder |
| Appearance | White to grayish/yellowish powder |
| Solubility | Soluble in water |
| Melting/Decomposition | Decomposes above 300°C |
Available Grades
We manufacture and supply:
- H Acid Industrial Grade
- H Acid Dye Intermediate Grade
- Customized purity and impurity specifications
Applications
Reactive Dye Manufacturing
H Acid is an important intermediate used in the synthesis of various reactive dyes, particularly dyes requiring a naphthol-sulfonic acid coupling component.
Applications include manufacturing dyes for:
- Cotton
- Viscose
- Rayon
- Other cellulosic fibers
Acid Dye Manufacturing
H Acid is used as an intermediate in the manufacture of acid dyes used for:
- Wool
- Silk
- Nylon
- Leather
- Other suitable substrates
Direct Dyes
H Acid can also be used in the synthesis of selected direct dyes for textile applications.
Dyestuff & Printing Applications
H Acid-based intermediates are used in the production of dyes for:
- Textile printing
- Paper coloration
- Dyestuff manufacturing
- Specialty colorants
Its principal commercial role is as an intermediate for azo dye synthesis, rather than as a finished dye itself.
Advantages
- Important raw material for azo dye synthesis
- Suitable for reactive dye manufacturing
- Suitable for acid dye manufacturing
- Useful for direct dye synthesis
- Consistent coupling performance
- Available in industrial and high-purity grades
- Bulk supply available
Packaging Details
Available in:
- 25 kg HDPE drums
- 25 kg bags with suitable inner liner
- Bulk packaging for larger requirements
Packaging can be selected according to customer requirements and applicable transportation regulations.
Storage Conditions
- Store in a cool, dry and well-ventilated area.
- Protect from moisture.
- Protect from contamination.
- Store on pallets and avoid direct contact with the floor.
- Follow the product-specific SDS/MSDS for detailed storage requirements.
Handling Precautions
- Avoid unnecessary contact with skin and eyes.
- Avoid inhalation of dust.
- Use appropriate gloves and protective eyewear.
- Provide adequate ventilation during handling.
- Use suitable dust-control measures during powder transfer.
- Follow the product-specific SDS/MSDS and workplace chemical-handling requirements.
Why Choose Us?
- Reliable H Acid manufacturers in India
- Consistent batch quality
- Bulk manufacturing and supply capability
- Competitive bulk pricing
- SDS/MSDS and TDS support
- Global export capability
FAQs
What is H Acid?
H Acid is a dye intermediate chemically known as 1-Amino-8-naphthol-3,6-disulfonic acid. It is primarily used in the manufacture of azo dyes.
What is the CAS number of H Acid?
The CAS number of H Acid is 90-20-0.
What is the molecular formula of H Acid?
H Acid has the molecular formula C₁₀H₉NO₇S₂ and a molecular weight of approximately 319.31 g/mol.
What is H Acid used for?
H Acid is mainly used as an intermediate for manufacturing reactive dyes, acid dyes and direct dyes.
Is H Acid a dye?
No. H Acid is primarily a dye intermediate, not a finished dye. It is reacted with other intermediates during the manufacture of various azo dyestuffs.
Is H Acid used for reactive dyes?
Yes. H Acid is an important intermediate used in the synthesis of various reactive dyes, particularly for textile applications.
Is H Acid used for acid dyes?
Yes. H Acid is also used as an intermediate in the manufacture of selected acid dyes.
What is the difference between H Acid and H Acid Sodium Salt?
H Acid refers to the acid form, while commercial materials can also be supplied or described in salt forms depending on the manufacturing process and specification. The exact chemical form should therefore be confirmed from the supplier’s COA and product specification.
What purity of H Acid is available?
Commercial H Acid is available in different purity grades. 97%+ purity is commonly offered, while higher-purity material can be supplied according to the required specification.
What impurities are typically controlled in H Acid?
Typical specifications can control related dye intermediates and organic impurities including Chromotropic Acid, W Acid, T Acid, K Acid and total organic impurities.
What is the physical form of H Acid?
H Acid is commonly supplied as a powder, although other commercial forms such as paste/cake may also be available depending on the grade.
Is H Acid soluble in water?
Yes. H Acid is described commercially as water-soluble, although the exact solubility behavior depends on concentration, temperature and chemical form.
What industries use H Acid?
H Acid is mainly used by the textile dye, dyestuff, printing, paper and specialty colorant industries as a dye-synthesis intermediate.
Do you supply H Acid in bulk?
Yes. We supply H Acid for bulk industrial and export requirements, subject to the required grade and specification.
Do you provide COA and MSDS for H Acid?
Yes. Batch-specific COA, SDS/MSDS and technical documentation can be provided with the supplied material.
