Polymate Additives Co. |Limited
Add: 206Shi, 101Dong, Huaqiaocheng
Pukou, Nanjing, China, 210031
Tel: +86 (0)25 570 11575
Fax: +86 (0)25 570 16494
Email: polymateadditives@gmail.com
Web: www.PolymateAdditives.com
  Phenolic Antioxidants
Plaox-1010, Plaox-1076, Plaox-1098
Plaox-1024, Plaox-3114
Organophosphite Antioxidants
  Plaox-168, Plaox-626
  Amine Antioxidants
  Plaox-BODPA, Plaox-DNDPA
Plaox-DODPA, Plaox-DCDPA
  Thioester Antioxidants
  Plaox-DLTDP, Plaox-DSTDP
  Blended Antioxidants
  Plaox-B215, Plaox-B225
  Heat stabilizers
  Pherst-TPP, Pherst-ODPP
Light stabilizers
HALS (hindered amine light stabilizers)
  Palst-770, Palst-622, Palst-944
Palst-783, Palst-791
, Palst-3529
  UVA (Ultraviolet absorbents)

Pamsorb-531, Pamsorb-P
Pamsorb-234, Pamsorb-326
Pamsorb-327, Pamsorb-328
Pamsorb-1164, Pamsorb-1577

Flame retardants
Brominated Flame retardants

Plamtar-TBBA, Plamtar-BDDP
Plamtar-DBDPE, Plamtar-BTBPOE
Plamtar-HBCD, Plamtar-TTBPC

  Halogen free Flame retardants
  Plamtar-RDP, Plamtar-BDP
Plamtar-DOPO, Plamtar-DOPO-HQ
About us | Products | Service | Contact us   
Light stabilizers  
    Ultraviolet absorbents    
    Pamsorb-531 | Pamsorb-P
Pamsorb-326 | Pamsorb-327 | Pamsorb-328
Pamsorb-1164 | Pamsorb-1577
    Ultraviolet absorbent Pamsorb-531    

Chemical name: 2-Hydroxy-4-n-octoxybenzophenone
Equivalent: Chimassorb 81 ( Ciba SC ) / Cyasorb UV-531 (Cytec)/Lowilite 22 (Chemtura)
Molecular formula: C21H26O3

Molecular weight: 326.43
CAS No.: 1843-05-6

Structural formula:

Physical properties

Appearance: Yellow powder
Melting range: 47 ~ 50 ˇăC

Flash point: Not available
Specific gravity (g/cm 3 ), @20 ˇăC: 1.16

Solubility (g/ 100g solvent), @20 ˇăC

Water: Insoluble
Benzene: 72.7

Acetone: 74.3
Ethanol : 2.6



Appearance: Yellowish crystal powders
Assay: 99.0% min
Melting point: 47.0 ~ 49.0 ˇăC
Ash: 0.1% max

Volatile: 0.5% max
Transmittance (425nm): 97.0% min
Transmittance (500nm): 98.0% min


Pamsorb-531 is a benzophenonelight stabilizer, capable of absorbing the UV radiation of 240-340nm wavelength. It is of light color, non-toxicity, good compatibility, small mobility and easy processing. It is widely applied to PE,PVC,PP,PS,PC organic glass, PP fiber, ethylene-vinyl acetate etc. Moreover, it has very good light-stability on drying phenol aldehyde, varnish of alcohol, polyurethane, acrylate, expoxnamee, etc. Its dosage is recommended to be 0.1% ~ 0.5%.



25kg /bag

HALS (hindered amine light stablizers)
Palst-770 | Palst-622 | Palst-944 | Palst-783 | Palst-791 | Palst-3346 | Palst-3529

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