1. Major Chemical Suppliers
- Sinochem Group  
  - Product Range: Petrochemical products, fertilizers, pharmaceuticals, fine chemicals.  
  - Features: State-owned enterprise with a strong global market presence and a wide range of products.

- China National Chemical Corporation (ChemChina)  
  - Product Range: Petrochemical products, rubber and tires, agrochemicals, specialty chemicals.  
  - Features: Large state-owned company focusing on multiple chemical sectors with strong technical capabilities.

- Shanghai Chemical Group  
  - Product Range: Phosphoric acid, potassium carbonate, isothiazolinone.  
  - Features: High-quality chemical raw materials with competitive pricing.

- Zhejiang Haichuan Chemicals Co., Ltd.  
  - Product Range: Iodine-based chemicals used in chemical analysis, pharmaceutical raw materials, and photosensitive materials.  
  - Features: ISO9001 certified, emphasizing environmental protection and occupational health and safety.

- Huilian Chemicals  
  - Product Range: Functional monomers, polymers, resin emulsions, curing agents, solvents, additives.  
  - Features: Integrates supplier resources to provide comprehensive solutions with an annual turnover of over 300 million yuan.

2. Types of Chemical Products
Chemical supply covers a wide range of applications, including:
- Chemical Reagents: High-purity inorganic, organic, and biochemical reagents.  
- Pharmaceuticals and Biochemicals: Raw materials for pharmaceuticals, finished drugs, and traditional Chinese medicine extracts.  
- Inorganic Chemicals: Inorganic salts, acids, bases, oxides.  
- Catalysts and Additives: Catalysts and various additives.  
- Food and Feed Additives: Food and feed additives.  
- Dyes and Pigments: Dyes and pigments.  
- Agricultural Chemicals: Pesticides and fertilizers.  
- Consumer Chemicals: Cosmetics and cleaning products.

3. Characteristics of Chemical Supply
1. Integrated Supply Chain: Chemical supply chains connect upstream and downstream industries, covering logistics, distribution, storage, and transportation.  
2. Quality and Safety: Suppliers must adhere to strict quality standards and safety regulations to ensure products are free from contamination.  
3. Customization: Many suppliers offer personalized services to meet specific customer needs.  
4. Environmental Sustainability: With increasing environmental regulations, there is a growing demand for eco-friendly chemicals.  
5. Technical Support: Some suppliers provide technical support to help customers optimize the use of chemicals.

4. Applications of Chemical Supply
1. Industrial Production: Used in chemical, pharmaceutical, electronics, and new energy industries for basic chemicals and specialty chemicals.  
2. Laboratory and Research: High-purity reagents for laboratory and research applications.  
3. Agriculture: Pesticides, fertilizers, and other agrochemicals.  
4. Consumer Goods: Cosmetics, food additives, and other consumer products.  
5. Environmental and Sustainability: Low-VOC products and biodegradable chemicals.

Conclusion
Chemical supply is a critical component of modern industry, supporting a wide range of sectors from manufacturing to research. If you have specific needs or want to know more about a particular supplier, feel free to provide more details for tailored advice.