Product name: Polydimethylsiloxane (PDMS, Dimethyl Silicone Oil 201‑series)
Synonyms: Dimethylpolysiloxane, Dimethyl silicone fluid, Silicone oil, Dimethicone
CAS‑No.: 63148‑62‑9
EC‑No.: 613‑156‑5
Molecular Formula: (C6H18OSi2)n
INCI Name: Dimethicone
Available viscosity grades: 5‑100000 cSt @25℃; Industrial / Cosmetic / Food‑contact grade
Normally 5cst, 10cst, 50cst, 100cst, 350cst, 500cst, 1000cst, 5000cst, 10000cst etc.
1. Product Specification（Typical for 100 cSt Industrial Grade）
| Item | Specification |
|---|---|
| Appearance | Colorless, transparent, odourless viscous liquid |
| Viscosity @25 ℃ | 100 ±8 cSt (mm²/s) |
| Density @25 ℃ | 0.960‑0.970 g/cm³ |
| Refractive Index nD²⁵ | 1.402‑1.404 |
| Volatile Matter (150 ℃, 3 h) | ≤0.5 % |
| Acid Value | ≤0.01 mgKOH/g |
| Flash Point (closed cup) | ≥300 ℃ |
| Pour Point | ≤‑50 ℃ |
| Heavy Metals | ≤10 ppm |
2. Physico‑Chemical Properties
Surface Tension @25℃: ~20.9 mN/m
Solubility: Insoluble in water, methanol, acetone; miscible with toluene, xylene, mineral oils and non‑polar solvents
Stability: Excellent thermal‑oxidative stability, chemically inert. Incompatible with strong oxidizing agents.
3. Main Applications
Cosmetic & personal‑care: Lubricant, smoothing agent, film‑former for shampoo, conditioner, cream and lotion (Cosmetic Grade).
Industrial field: High‑effective defoamer for chemical, textile, water‑treatment; mould‑release agent for plastic & rubber; lubricant for machinery; insulating fluid for electrical equipment.
Textile industry: Softener, water‑repellent finishing agent for fibre and fabric.
Food‑contact grade: Release agent for food processing equipment, anti‑foaming auxiliary.Other: Heat‑transfer medium, polish additive for leather and furniture.
4. Storage & Handling
Store in tightly‑closed containers in cool, dry and well‑ventilated warehouse. Keep away from high‑temperature and open flame.
Avoid mixing with strong oxidants. Non‑hazardous goods for transportation.
Shelf‑life: 24 months under original sealed packaging.
5. Packaging
200 kg iron drum / IBC tote tank.
Disclaimer: This Technical Data Sheet is for reference only. Actual values shall be subject to batch‑specific Certificate of Analysis. Please refer to Safety Data Sheet for safety‑related information.
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