Polyisobutylene Succinimides (PIBSI)
| Formula: | C₁₆H₂₉NO₄ (typical repeat unit, varies with grade) |
| CAS Number: | 63150-03-8 (general) |
| EC Number (EINECS): | Not specifically listed (polymeric substance) |
| HS Code: | 38112100 (Additives for lubricating oils, containing petroleum/bituminous mineral oil) |
| UN Number: | Not classified as dangerous goods |
| IUPAC Name: | Polyisobutylene Succinimide (polymeric mixture) |
| Also Known As: | PIB Succinimide; PIB Amide-Imide Dispersant |
| Molecular Weight, g/mol: | Varies with grade (typically Mn 700–2300 for PIB backbone) |
Typical Specifications
| Appearance: | Dark brown viscous liquid |
| Odor: | Characteristic, mild |
| Solubility: | Soluble in mineral oils and synthetic base oils |
| Grades Available: | High MW PIBSI, Low MW PIBSI, Borated PIBSI |
| Packaging: | 200kg drums, 1000kg IBC, bulk ISO tanks |
Applications / Uses
Primary Applications
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Detergent–dispersant additive in engine oils and lubricants
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Prevents sludge and varnish formation in internal combustion engines
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Improves oxidation stability and dispersancy of lubricants
Secondary Applications
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Used in gear oils, hydraulic oils, and transmission fluids
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Additive in marine and heavy-duty diesel engine oils
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Component in metalworking fluids
End Industries Served: Automotive, Marine, Industrial Lubricants, Oil & Gas, Transportation
Safety & Handling Information
Hazard Class (GHS): Not classified as highly hazardous; may cause skin/eye irritation
Hazard Statements (H-Codes):
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H315: Causes skin irritation
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H319: Causes eye irritation
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H335: May cause respiratory irritation (aerosol/mist)
Precautionary Statements (P-Codes):
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P280: Wear protective gloves/eye protection
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P261: Avoid breathing mist/vapors
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P302 + P352: IF ON SKIN – wash with plenty of soap and water
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P305 + P351 + P338: IF IN EYES – rinse cautiously with water, remove contact lenses
Storage Conditions
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Store in closed, dry, ventilated containers
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Avoid exposure to high temperatures and moisture
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Handle with oil-compatible transfer systems
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