PROTAPHENONE-4

Approved use level: 5-10%. Used to enhance UVA/B efficacy where a water
soluble active is required. Helps stabilize UV sensitive formulations such as hair
dyes, hair sprays, facial toning lotions, etc.
CTFA/INCI NAME: BENZOPHENONE-4
CAS NUMBER: 4065-45-6
PHYSICAL FORM: Yellow to beige powder

 SPECIFICATIONS:

K-Value @ 285 nm 46.0 - 50.0 l/gr-cm
Color, Gardner 4.0 Maximum
(10% in water)  
pH (10% in water) 1.2 - 2.2
(1% in water @ 25 degrees C)
 1.2 - 2.2
SOLUBILITIES: 5% @ 25 degrees C

Soluble:

Water
Propylene Glycol
Isopropyl Alcohol
Ethanol
Insoluble:
 
 
Mineral Oil
Isopropyl Myristate
APPLICATIONS:
Water soluble Category I UV-A/B Sunscreen.
Approved use level: 5-10%. Used to enhance UVA/B efficacy where a water
soluble active is required. Helps stabilize UV sensitive formulations such as hair
dyes, hair sprays, facial toning lotions, etc.