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Chimassorb® 81 P

Technical Datasheet | Supplied by BASF
HSP Distance with Longlock U010: 0.0
Chimassorb® 81 P by BASF is benzophenone which acts as a UV absorber. It imparts good light stability when used in combination with a hindered amine light stabilizer (HALS) of the Chimassorb®, Tinuvin® or Uvinul® range. Shows good compatibility with polyolefins and plasticized PVC. Protects a number of other polymers against degradation caused by light exposure such as plasticized PVC and rubbers. It can also be used in combination with antioxidants, phosphites and other light stabilizers. Suitable for low density and linear low density polyethylene as well as ethylene-vinyl acetate copolymers for agricultural films. It can be used as well as a UV barrier to protect the contents of packages for both industrial and consumer applications. Particularly suitable for thick films, typically > 100 μm and thick sections. Its low vapor pressure prevents losses during processing. Low migration rates reduce the risk of blooming. Also, in combination with HALS, Chimassorb® 81 P can be used in high density polyethylene molded articles, e. g. in crates. Recommended dosage is 0.10-0.5% for PE and 0.15-0.5% for LLDPE, LDPE and EVA.
Product Type
Light Stabilizers / UV Absorbers > Benzophenones
Chemical Composition
CAS Number
Physical Form
Product Status
Applications/ Recommended for
  • Other Thermoplastic > EVA
  • PE > HDPE
  • PE > LLDPE
  • PE > LDPE
  • PVC > PVC, flexible
  • Packaging > Industrial / Agriculture / Consumer goods > Films, standard
  • Households products/ Consumer Goods > Boxes & crates
  • Barriers > UV light filtering

Chimassorb® 81 P Properties


Value & Unit
Test Condition
Test Method
Molecular Weight
326.4 g/mol
Melting Point
47 - 49 °C
Flash Point
> 200 °C
DIN 51758

SpecialChem additionnal informations based on CAS Number : 1843-05-6

Hansen Solubility Parameters

[18.6, 9.2, 3.9]
[δD - Dispersion force interactions, δP - Polar force interactions, δH - Hydrogen bond force interactions]

Please note, these HSP values are estimations. It is based upon the “like seeks like” principle. It splits an ingredients interactions into three parameters; δD (Dispersion force interactions), δP (Polar forces interactions) and δH (Hydrogen bond force interactions). Hansen Solubility Parameters can help you find a wide range of products that are predicted to be compatible with Chimassorb® 81 P. A practical determination of these HSP values would provide higher certainty. Learn More.

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