Sodium Dodecyl Sulfate (SDS)(K12)
| Critical Quality Items | Standard of Analysis | Result of Analysis | |
| Appcarance | White powder form | White powder form | |
| Active matter(%) | ≥93 | 93.51 | |
Petroleum ether soluble substances | ≤1.5 | 0.54 | |
| Inurganic salts (Na₂SO₄+NaCl) | Na₂SO₄ | ≤4.8 | 4.31 |
| NaCL | ≤0.15 | 0.07 | |
| Water(%) | ≤2.0 | 1.50 | |
| PH(1%ap.Solution) | 7.5-10.5 | 9.65 | |
| Whiteness | ≥90 | 91.8 | |
Sodium dodecyl sulfate (SDS)(K12) is a widely used anionic surfactant with the chemical formula C₁₂H₂₅SO₄Na. Below is a summary of its key information:
I. Basic Properties
- Physical Characteristics: White or pale yellow powder, highly soluble in water, density 1.03 g/cm³, melting point 206–207°C.
- Chemical Stability: Resistant to alkali and hard water; compatible with anionic and nonionic surfactants.
- Safety: Low toxicity to humans, biodegradable (>90%), and environmentally friendly.
II. Primary Applications
1. Industrial Uses
- Detergents & Textiles: Acts as a cleaning agent, emulsifier, or bleach/dyeing aid in laundry and textile processing.
- Construction & Chemicals: Used as a cement grinding aid, plastic mold release lubricant, and emulsion polymerization emulsifier.
- Firefighting & Mineral Processing: Applied in mine fire suppression and metal ore flotation.
2. Personal Care & Household Products
- Cosmetics: Foaming and cleansing agent in shampoos, toothpaste, etc.; non-comedogenic.
- Foaming Agent: Used in fire extinguishers and food processing for foam generation.
3. Food & Pharmaceuticals
- Food Industry: Approved as a processing aid (GB 2760-96) for emulsification and stabilization in cakes, beverages, etc.
- Pharmaceuticals: Serves as an emulsifier, solubilizer, or tablet lubricant.
4. Research & Miscellaneous
- Biochemical Analysis: Key component in SDS-PAGE for cell membrane disruption and protein separation.
- Electroplating & Oxidation: Reduces surface tension in plating baths to prevent pinhole defects.
III. Safety & Precautions
- Health Risks: Irritates mucous membranes and respiratory tract; use protective gear during handling.
Storage & Handling: Store away from ignition sources, avoid dust generation, and use closed systems with emergency equipment.
