hazard assessment svhc uv absorbers polymer additives plastic additives light stabilizers benzotriazoles uv-328 tinuvin 328 polypropylene pp light stabilizer tpo automotive plastics osha ghs hazard communication labels chemical safety sds safer chemicals chemicals 3896-11-5 greenscreen uv-326 uv absorber bumetrizole hindered amine light stabilizers hals scratch resistance anti-scratch uv stability outdoor exposure polyolefin uv stabilizer antioxidant nucleation nucleating agents stabilization plastics weathering light stability
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