Polypropylene Glycol (PPG, CAS 25322-69-4) is a series of non-ionic polyether viscous liquids. Water-solubility decreases as molecular weight increases. It provides excellent lubricity and defoaming performance. Widely used for polyurethane synthesis, metal-working fluids, coatings, cosmetics and chemical intermediates. TNJ Chemical is the key manufacturer and exporter since from 2001. If you want to buy PPG at competitive price from Chinese manufacturer, please contact sales@tnjchem.com
Brief introduction of Polypropylene glycol CAS 25322-69-4
Chemical Name:Poly(propylene glycol)
Other name:PPG;Polypropylene glycol; Poly(propylene oxide).
CAS No.:25322-69-4
Molecular formula:H[OCH(CH3)CH2]nOH
Chemical structure:none
EINECS No.:200-338-0
MW:16.04246
Available grades: PPG‑200,400,600,1000,1500,2000,3000,4000,6000,8000
Grade Selection Tips
Low-molecular PPG-200 / 400: water-miscible, for cosmetics, solvent, auxiliary agent
Mid-molecular PPG-1000-2000: main raw material for flexible polyurethane foam
High-molecular PPG-3000-4000: for PU elastomer, sealant, defoamer, metal-working lubricant
Chemical and physical properties
Appearance: Clear, colorless to pale‑yellow viscous liquid (all grades are liquid at room temperature)
Solubility: Low‑MW grades miscible with water; high‑MW grades water‑insoluble; soluble in alcohols & organic solvents
Feature: Non‑ionic polyether, good lubricity, defoaming property, low volatility, hygroscopic
Polypropylene Glycol (PPG) Grades Specification
| Grade | Hydroxyl Value (mgKOH/g) | Average Molecular Weight | Appearance | Water‑Solubility |
|---|---|---|---|---|
| PPG‑200 | 510‑560 | 200 | Clear colorless viscous liquid | Miscible with water |
| PPG‑400 | 255‑312 | 400 | Clear colorless viscous liquid | Miscible with water |
| PPG‑600 | 170‑208 | 600 | Clear colorless viscous liquid | Partially miscible |
| PPG‑1000 | 102‑125 | 1000 | Clear colorless viscous liquid | Slightly soluble |
| PPG‑1500 | 68‑83 | 1500 | Clear colorless viscous liquid | Poorly soluble |
| PPG‑2000 | 51‑62 | 2000 | Clear colorless viscous liquid | Insoluble in water |
| PPG‑3000 | 34‑42 | 3000 | Clear colorless viscous liquid | Insoluble in water |
| PPG‑4000 | 25‑31 | 4000 | Clear colorless viscous liquid | Insoluble in water |
General common indexes for all grades
| Test Item | Specification |
|---|---|
| Color (APHA) | ≤ 20 |
| Water, % | ≤ 0.5 |
| Acid Value (mgKOH/g) | ≤ 0.5 |
| pH (1% aqueous solution) | 5.0‑7.0 |
Application & Use
Polyurethane raw material: produce PU foam, elastomer, sealant
Industrial additive: defoamer, lubricant, metal‑working fluid, hydraulic fluid, dispersant for coating & ink
Cosmetic: emollient, humectant, solubilizer
Others: chemical intermediate, plasticizer, pesticide auxiliary
Packing, Transportation & Storage
‑ Package: 200 kg steel drum, or as per request
‑ Store in cool, dry, ventilated warehouse, keep sealed (hygroscopic)
‑ Shelf‑life: 24 months under proper storage
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