ZDDP (Zinc Dialkyldithiophosphate)
| Formula: | C₁₂H₂₆O₄PS₂Zn (typical, varies by alkyl group) |
| CAS Number: | 68649-42-3 |
| EC Number (EINECS): | 272-028-3 |
| HS Code: | 38112900 |
| UN Number: | Not classified under UN numbers (not typically assigned) |
| IUPAC Name: | Zinc O,O′-dialkyl dithiophosphate |
| Also Known As: | Zinc Alkyl Dithiophosphate; Zinc O,O-Dialkyl Phosphorodithioate |
| Molecular Weight, g/mol: | ~474–500 (varies with alkyl chain length) |
Typical Specifications
| Appearance: | Clear to yellow-brown liquid |
| Odor: | Slight characteristic odor |
| Density, g/cm³ (at 20°C): | 1.13–1.18 |
| Flash Point, °C: | ≥200 |
| Solubility: | Insoluble in water; soluble in oils |
| Purity, %: | ≥99 |
| Grades Available: | Lubricant Additive Grade (various alkyl chain lengths) |
| Packaging: | 200kg drums, 1000kg IBCs, bulk tanks |
Applications / Uses
Primary Applications
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Anti-wear and antioxidant additive in engine oils and lubricants
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Corrosion inhibitor for metal surfaces
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Enhances thermal stability in lubricating systems
Secondary Applications
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Additive in hydraulic fluids, greases, and industrial oils
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Friction modifier in high-performance lubricants
End Industries Served: Automotive, Industrial Lubricants, Metalworking, Heavy Machinery, Marine Oils
Safety & Handling Information
Hazard Class (GHS): Eye Irritation (Category 2), Skin Irritation (Category 2), Aquatic Toxicity (Chronic Category 2)
Hazard Statements (H-Codes):
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H315: Causes skin irritation
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H319: Causes serious eye irritation
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H411: Toxic to aquatic life with long-lasting effects
Precautionary Statements (P-Codes):
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P280: Wear protective gloves/eye protection
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P273: Avoid release to the environment
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P302 + P352: IF ON SKIN – wash with plenty of water
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P305 + P351 + P338: IF IN EYES – rinse cautiously with water, remove contact lenses if present
Storage Conditions
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Store in tightly closed containers
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Protect from moisture and direct sunlight
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Store in a cool, dry, ventilated area
Transport Information
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ADR/RID: Not classified as dangerous goods
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IMDG: Not classified as dangerous goods
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IATA: Not classified as dangerous goods