Common Name(s): Microcrystalline wax,petrowax micro,microwax
CAS Number: 63231-60-7
DESCRIPTION
What It Does: Provides flexible, adhesive structure for cosmetic sticks and pencils with superior oil-binding vs paraffin.
Why It's Used: Premium stick cosmetic wax – superior flexibility and oil binding vs paraffin for smooth-applying, non-brittle lip and eye products.
How It Works: Highly branched c30-c75 isoalkanes provide irregular microcrystalline structure (smaller crystals than paraffin). irregular packing provides more flexible, less brittle wax. better oil retention in interstices between microcrystals. higher melting point (60-90°c) than paraffin.
Typically Found In: Lipsticks,eye pencils,solid stick products
TECHNICAL DETAILS
Primary Category: Functional ingredient – microcrystalline petroleum wax
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 1%–25%
SOURCING & ETHICS
Vegan Status: Conditional - supplier confirmation required
Halal Status: Unverified - supplier confirmation required
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier. [audit 2026-07-29 rev2: the record's own source_notes does not assert a non-animal origin, or instructs the reader to verify with the supplier; "yes" asserts knowledge the record does not hold. determination requires shariah-panel sign-off.]
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Microcrystalline wax's flexibility advantage over paraffin arises from its branched molecular structure preventing the tight, regular crystalline packing that makes paraffin brittle. the irregular microcrystal structure interlocks with liquid oil molecules, providing superior oil binding that prevents sweating (oil migration to surface) in finished stick products during storage.
Last Verified: 2026-03-12
Primary Sources: Cosing database,cir safety assessment