Polysilicone-15 (INCI) is an organic compound used in hair products like shampoos, conditioners, hair sprays, pomades and color treatment products to absorb UVB radiation. In the EU, it is also approved for use in sunscreens and cosmetics. The absorption maximum is at about 310 nm. It is marketed as Parsol SLX by DSM.

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Polysilicone-15

Names
IUPAC names α-(trimethylsilyl)- ω-(trimethylsilyloxy)poly[oxy(dimethyl)silylene]- co-[oxy(methyl)(2-{4-[2,2-bis(ethoxycarbonyl)vinyl]phenoxy}- 1-methyleneethyl)silylene]- co-[oxy(methyl)(2-(4-[2,2-bis(ethoxycarbonyl)vinyl]phenoxy)prop-1-enyl)silylene]
Other names Parsol SLX
Identifiers
CAS Number	207574-74-1 Y
ChemSpider	none
ECHA InfoCard	100.102.446
UNII	F8DRP5BB29 Y
Properties
Appearance	colorless or pale yellow liquid
Solubility in water	practically insoluble
Solubility in organic solvents of medium polarity	soluble
Pharmacology
Routes of administration	local
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references

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The backbone chain is mainly composed of siloxane repeat units, and is of low molecular weight, so being classed as an oligomer.

• Parsol SLX

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