Butyl Benzyl Phthalate
AKA “Benzyl butyl phthalate, Sicol, Palatinol BB, Unimoll BB, Santicizer 160, Butylbenzyl phthalate, n-Butyl benzyl phthalate, Sicol 160
Synthetic
Ingredient Facts
Butyl benzyl phthalate
AKA: Benzyl butyl phthalate, Sicol, Palatinol BB, Unimoll BB, Santicizer 160, Butylbenzyl phthalate, N-Butyl benzyl phthalate, Sicol 160
Synthetic · Emollient · EWG: 4
Synthetic
Emollient
Occlusive
Skin Conditioner
Synthetic
Not Clean
A flexible conditioning agent that helps formulas stay smooth and spreadable on skin, improving product texture and application.
Solubility less than 0.1 mg/mL at 72.5 °F (NTP, 1992)
Formula
C19H20O4
Mol. Weight
312.40
CAS #
85-68-7
Form
Liquid
State
Butyl benzyl phthalate appears as a clear colorless liquid with a mild odor. Primary hazard is to the environment. Immediate steps should be taken to limit spread to the environment. Easily penetrates
See origin →
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Viscosity Controlling
Emollient
Fills in the tiny cracks between skin cells to make everything feel smooth and soft. The "silky finish" ingredient.
Plasticizer
Antioxidant
Protects skin from free radical damage caused by UV, pollution, and stress
Anti-Inflammatory
Adds flexibility
Traditional Use
Synthetic plasticizer developed in the 20th century for use in cosmetic formulations, particularly nail products and flexible polymers. Created to improve product texture and application properties.
Skin Types
all-skin-types
Best For
General
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
No
EWG
4
CIR
Safe w/Qualifications
Pregnancy
No
CIR Safety Findings
medical-approval
all-shades-safe
Phototoxicity Concern
Regulatory Status
USApermitted
EUpermitted
JAPANpermitted
CANADApermitted
Verified Feb 2026
Data: PubChem · CosIng · EWG · CIR