Contact us
- No.420 Zhonghua Road,Qinghuai District, Nanjing,China 210001
- 008618005174481
- Mr.Sam
- sales@nanjingchem.com
Product Introduction
2. Introduction
3. Complete Technical Specification Sheet
Physical & Chemical Indexes of Industrial Grade H Acid 80%
| Test Item | Standard Specification | Test Standard |
|---|---|---|
| Full Chemical Name | 1-Amino-8-Naphthol-3,6-Disulfonic Acid (H Acid) | — |
| CAS Number | 90-20-0 | — |
| EINECS Number | 201-975-7 | — |
| Molecular Formula | C₁₀H₉NO₇S₂ | — |
| Molecular Weight | 319.31 | — |
| Appearance | Off-white to light grey crystalline powder | Visual Inspection |
| Main Effective Content (H Acid Base) | ≥ 80.0 % | HPLC High Performance Liquid Chromatography |
| Total HPLC Purity of Effective Components | ≥ 97.0 % | HPLC Test |
| Chromotropic Acid Impurity | ≤ 1.50 % | HPLC |
| T-Acid Isomer Impurity | ≤ 0.50 % | HPLC |
| ω-Acid Isomer Impurity | ≤ 0.50 % | HPLC |
| K-Acid Isomer Impurity | ≤ 0.50 % | HPLC |
| Water Insoluble Substance | ≤ 0.20 % | Gravimetric Method |
| Moisture Content | ≤ 5.00 % | Drying Weight Loss Test |
| Solubility | Soluble in alkaline aqueous solution, slightly soluble in cold water, ethanol and ether | Lab Solubility Test |
| Compliance Standard | EU REACH Registered, ISO9001, Global Textile Chemical Restriction Standard | ECHA & ISO Certification |
4. Our Factory Profile & R&D Green Production Strength
4.1 Factory Scale; Team Configuration
- Total factory land coverage: 100 mu, closed-loop full-process production workshop with automatic feeding, continuous sulfonation, reduction and acid precipitation lines.
- Total on-site staff: 150 workers, including 30 full-time professional technical engineers covering synthesis process, quality inspection, environmental wastewater treatment and product application R&D.
- Independent QC laboratory equipped with high-precision HPLC, UV spectrophotometer and isomer detection instruments, each batch implements full-item inspection before delivery.
4.2 University & Research Institute Joint R&D Cooperation
We establish long-term joint research projects with multiple domestic universities and chemical environmental research academies, focusing on three core research directions for H Acid 80% and other dye intermediates:
- Green catalytic synthesis process optimization: Replace traditional high-pollution reduction routes with low-waste clean catalytic technology, lower by-product generation rate.
- Product quality upgrading: Minimize harmful isomer impurities to enhance dye color fastness and reduce post-dye wastewater chroma for downstream textile factories.
- Comprehensive waste treatment technology: Develop integrated recycling system for production wastewater, waste acid and solid salt residues, realize resource recovery and meet global strict environmental export standards.
- Environmental & Production AdvantagesAll production wastewater goes through multi-stage neutralization, membrane filtration and evaporation recycling; solid waste is classified and resourcefully treated. Our green production technology greatly reduces carbon footprint, making our H Acid 80% qualified for EU textile import audit, without customs detention risks caused by excessive pollutant residues.
5. Key Product Advantages of Our H Acid 80%
- Ultra-stable coupling performance: Strict control of multiple isomer impurities (chromotropic acid, T-acid, ω-acid) below international standard limits, ensuring consistent color shade, high color fastness and low wastewater chroma for finished dyes.
- Mature green manufacturing process: Supported by university joint R&D clean technology, low heavy metal residual, fully compliant with REACH, OEKO-TEX textile chemical requirements for European and American textile export brands.
- Complete customized technical support: Our 30 professional technical team can provide targeted formula guidance for reactive red, acid black, direct black and other dye synthesis schemes, solving coupling yield and color defect problems for downstream manufacturers.
- Stable large-volume supply capacity: Automatic continuous production lines guarantee sufficient monthly spot inventory, support 20ft/40ft full container bulk orders and small lab trial sample delivery.
- Full set export compliance documents: Each shipment provides official HPLC COA, full English MSDS, REACH registration supporting documents and environmental waste treatment certification for smooth customs clearance in Europe, Southeast Asia, India, Middle East and Latin America.
6. Main Industrial Applications of H Acid 80%
- Reactive Brilliant Red K-2BP, Reactive Violet K-3R, Reactive Blue K series and other hot-selling reactive colorants
- Features high dye fixation rate, bright color and excellent washing fastness, suitable for garment, home textile and denim printing & dyeing factories
6.2 Acid Dyes for Wool, Silk & Nylon
- Acid Magenta Red G, Acid Red 6B, Acid Black BN, Acid Navy Blue series dyes
- Delivers soft color tone, uniform dye uptake and anti-fading performance for wool fabrics, silk scarves and nylon textile products
6.3 Direct Dyes for Cotton & Paper Coloring
6.4 Other Fine Chemical Niche Applications
- Azo pigment intermediate for water-based printing ink and coating colorants
- Raw material for part pharmaceutical indicator reagents and analytical lab chemicals
- Auxiliary synthetic intermediate for leather dyeing auxiliaries and textile color fixing agents
7. Packaging, Storage & International Shipping Guidelines
7.1 Standard Packaging
- Conventional bulk export: 25kg lined PE woven plastic bag, 18MT per 20ft full container load, 27MT per 40ft container
- Customized ton jumbo bag and private label printed packaging available for long-term large cooperative dye manufacturers
7.2 Safe Storage Conditions
- Store H Acid 80% powder in cool, dry, well-ventilated enclosed warehouse, storage temperature below 35°C
- Keep bags tightly sealed to prevent moisture absorption and agglomeration; avoid direct sunlight and rain erosion
- Separate thoroughly from strong oxidants, strong alkali, food raw materials and textile finished goods to avoid cross-contamination
7.3 International Trade & Shipping Service
8. FAQ
Q1: What is H Acid 80% mainly used for?
A: H Acid 80% (CAS 90-20-0) is a critical naphthalene dye intermediate, mainly used to synthesize three major categories of textile azo dyes: reactive dyes for cotton fabrics, acid dyes for wool & silk, and direct dyes for cotton, paper and leather coloring. It can also be applied to produce water-based ink pigments and partial laboratory analytical reagents.
Q2: What is the advantage of your factory’s H Acid 80% compared with other suppliers?
A: Our factory covers 100 mu with 150 full-time staff and 30 professional technical R&D engineers. We cooperate with multiple universities to develop green H Acid synthesis technology, with strict control of isomer impurities far below industry average standards. Meanwhile, we realize closed-loop recycling of production wastewater and solid waste, fully meeting strict global environmental export standards, providing stable high-purity products and professional downstream dye formula technical support.
Q3: Is your H Acid 80% REACH registered for bulk export to European textile manufacturers?
A: Yes, our H Acid 80% substance holds complete EU REACH supporting documents and full batch SVHC test reports. We can provide official compliance declaration, wastewater treatment certification and HPLC quality certificate to support customs inspection in EU member countries without detention risk.
Q4: What is the impact of high impurity isomers (chromotropic acid, T-acid) in H Acid on finished dyes?
A: Excessive isomer impurities will cause uneven dye color shade, reduce color fastness of textile products, increase wastewater chroma after dyeing and raise downstream factory waste water treatment cost. Our H Acid 80% strictly limits all harmful isomers below 1.5% maximum, effectively avoiding these production defects for dye manufacturers.
Q5: Can you provide free test samples of H Acid 80% before bulk order? Do you offer volume discount?
A: We supply small lab test samples for dye factory coupling experiment and quality verification. Competitive bulk wholesale prices are offered for long-term cooperative large dye manufacturing enterprises. Our 30-person professional technical team can provide free customized dye synthesis formula optimization guidance.
Q6: What is the shelf life of sealed H Acid 80% powder? How to store it properly?
A: Under tightly sealed cool and dry warehouse storage conditions, the shelf life of H Acid 80% reaches 24 months. Long-term damp storage will lead to powder agglomeration and slightly reduce coupling activity, so rain-proof and moisture-proof storage is required.
