Tributyl Citrate

AKA: 77-94-1, Tributyl 2-hydroxypropane-1, 2, 3-tricarboxylate, Tri-n-butyl citrate, Citroflex 4, Citric acid, Tributyl ester, 1, 3-Propanetricarboxylic acid, Citric Acid Tributyl Ester, Morflex tbc
Synthetic
Occlusive
Solvent
Clean
OriginSynthesized from citric acid and butanol, both derived from petroleum or fermentation sources. Produced through esterification, where citric acid reacts with butanol in the presence of a catalyst.
Tributyl citrate has been reported in Artemisia baldshuanica, Lonicera caerulea, and Calophyllum inophyllum with data available.
Formula
C18H32O7
Mol. Weight
360.40
CAS #
77-94-1
Form
Liquid
State
Liquid
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Film Forming
Creates a physical seal on skin to lock moisture in and keep irritants out. The "slugging" ingredient — barrier protection.
Plasticiser
Solvent
Dissolves other ingredients so they distribute evenly in the formula. Often the invisible "base" everything else is mixed into.
Antioxidant
Anti-Inflammatory
Creates protective layer
Adds flexibility
Dissolves other ingredients
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
1 study / 1 not sensitizing (CIR 590)
Concentration Guide
Leave-on0.0005–9%
Rinse-off0.0009–5%
0%50%100%
CIR reported use · report published 2014
Regulatory Agencies
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR
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