CAS 62566 Chemical Materials Thiourea For Electroplating Silver Plating
Product Specifications
CAS | 62-56-6 |
EINECS | 200-543-5 |
Appearance | White glossy crystal |
Crystalline hydrate | Water-free |
Available port | Qingdao Port, Tianjin Port, Shanghai Port, Lianyungang Port, Fujian Port, Guangzhou Port |
Life span | Two years |
Density | 1.41 g/cm³ |
Molecular weight | 76.121 |
Refractive index | 1.654 |
Product Description
Thiourea (99% purity, CS(NH2)2) is classified as a dangerous chemical with the following properties:
Physical and Chemical Properties
- Appearance: White crystal powder
- Density: 1.405 g/cm³
- Molecular weight: 76.12 g/mol
- Melting point: 171-175°C
- Boiling point: 349-352°F (NTP, 1992)
Production Standard (GB/8218-2018)
No. | Test Item | Standard Value |
---|
1 | Thiourea (CS(NH2)2) % ≥ | 99.0 |
2 | Heating interval % ≤ | 0.35 |
3 | Chemical moisture % ≤ | 0.01 |
4 | Water insoluble % ≤ | 0.02 |
5 | Thiocyanate (CNS) % ≤ | 0.02 |
6 | Melting point (°C) | 171 |

Detailed Chemical Properties
- Molecular weight: 76.12 g/mol
- Appearance: White or light yellow crystalline powder, glossy
- Odor: Odorless or slight sulphide odor
- Density: 1.405 g/cm³ (20°C)
- Melting point: 176-178°C (decomposition)
- Chemical Safety: Class 6.1 toxic substances
- Solubility: Water (13.7g/100mL at 20°C), slightly soluble in ethanol
- Acid-base properties: Weakly basic, forms salts with acids
- Reducibility: Can be oxidized by oxidants
- Complexation: Forms complexes with metal ions (Ag+, Au+, Cu²+)
- Thermal stability: Decomposes above melting point
- Hydrolysis: Produces urea and hydrogen sulfide under acidic/alkaline conditions

Industrial Applications of Thiourea
1. Metal Processing and Surface Treatment
- Electroplating additive for silver, gold, and copper plating
- Metal surface polishing agent
- Corrosion inhibitor in metal pickling processes
2. Precious Metals Extraction and Recovery
- Gold and silver leaching from ores and electronic waste
- Metal separation and purification through complex formation
3. Chemical Synthesis and Catalysis
- Pharmaceutical intermediates (anti-thyroid and anticancer drugs)
- Pesticide synthesis (insecticides, fungicides, herbicides)
- Dye and pigment production
- Organic reaction catalyst
4. Rubber and Plastics Industry
- Rubber vulcanization accelerator
- Plastic modifier for improved heat resistance and aging properties
5. Textile and Printing Industry
- Dyeing aid for improved color fastness
- Printing aid for better fiber adhesion
6. Environmental Protection and Water Treatment
- Heavy metal removal from industrial wastewater
- Boiler water deoxidizer
7. Photography and Imaging Industry
- Photographic developer component
- Developer stabilizer
8. Laboratory and Scientific Research
- Analytical reagent for metal detection
- Masking agent in chemical analysis
9. New Energy and Electronics Industry
- Battery material for lithium-sulfur batteries
- Semiconductor processing aid
10. Other Special Applications
- Synthetic resin modification
- Antioxidant for chemical protection

Riel Chemical Product Advantages
1. High Quality and Reliability
- Strict quality control throughout production
- ISO, REACH, RoHS certified
- Consistent batch-to-batch performance
2. Technological Innovation and R&D Capability
- Experienced R&D team
- Customized solutions for specific needs
- Continuous product innovation
3. Environmental Protection and Sustainability
- Eco-friendly production processes
- Low-toxicity, biodegradable products
- Resource recovery and reuse programs
4. Wide Range of Applications
- Diverse product line for multiple industries
- Applications in construction, automotive, electronics, textiles, medicine, and agriculture
5. Excellent Customer Service
- Comprehensive technical support
- Rapid response customer service
- Global service network
6. Cost-Effectiveness and Competitiveness
- Competitive pricing
- Long-term cooperation benefits
7. Global Supply Chain and Logistics
- Stable raw material supply
- Efficient global logistics
- Worldwide production and distribution
8. Brand Reputation and Market Recognition
- Strong industry reputation
- Trusted by global enterprises
- Market leadership in multiple segments
Frequently Asked Questions
1. What is your payment term?
We accept T/T and L/C at sight as payment terms.
2. Are you able to deliver on time?
Yes, we specialize in this product line and maintain strict delivery schedules while ensuring top quality.
3. Do you provide free samples?
Yes, we provide free samples with the customer responsible for express shipping costs.
4. How about the price? Can you make it cheaper?
We prioritize customer value and offer competitive, negotiable pricing based on order specifics.
5. Can I visit your company and factory in China?
Yes, we welcome visits to our Weifang facility and provide airport transportation assistance.
6. What if there is a quality problem?
Our professional after-sales team promptly addresses all quality concerns.