Common Name(s): Trimethylolpropane triisostearate,trimethylolpropane isostearic acid (triisostearate, branched c18) ester
DESCRIPTION
What It Does: Softens skin with a liquid non-crystallizing; branched triple ester; premium non-greasy emollient emollient texture.
Why It's Used: Trimethylolpropane ester of isostearic acid (triisostearate, branched c18); liquid non-crystallizing; branched triple ester; premium non-greasy emollient; branched polyol ester reduces greasiness.
How It Works: Tmp provides a trifunctional branched core; isostearic acid (triisostearate, branched c18) provides emolliency; branched structure reduces crystallinity.
Typically Found In: Skin care emollients,color cosmetics,anhydrous formulas
TECHNICAL DETAILS
Primary Category: Functional ingredient โ emollient
Secondary Functions: Skin conditioning,texture modification
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%โ10%
SOURCING & ETHICS
Vegan Status: Yes
Halal Status: Yes
Source Notes: Tmp synthetic; isostearic acid (triisostearate, branched c18) from plant or synthetic origin.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 โ very low
Comedogenicity Rating: 1/5 โ low
Sensitivity Concerns: Generally well tolerated.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile. ewg score: 1.
Works Well With: Other emollients,waxes,emulsifiers
Avoid Combining With: No significant incompatibilities
SCIENTIFIC NOTE
Tmp triisostearate: all 3 tmp arms esterified with branched isostearate; liquid non-crystallizing; premium non-greasy emollient used in luxury skin care and long-wear color cosmetics.
Last Verified: 2026-03-28
Primary Sources: Cosing database,inci dictionary