Know Your Environment. Protect Your Health.
EWG Home EWG’s Guide to Healthy Cleaning EWG’s Food Scores Healthy Living App Open menu

EWG's Skin Deep®
Find products and ingredients Learn how Skin Deep® works Meet our experts Discover EWG VERIFIED™
GET UPDATES DONATE
Score legend
HOW WE DETERMINE SCORES Learn more About EWG VERIFIED™

Data: Fair

Cyclopentasiloxane

IMAGE SOURCE: PubChem

SEARCH PRODUCTS

Other Concerns

Neurotoxicity (low), Endocrine disruption (low), Persistence and bioaccumulation (high), Non-reproductive organ system toxicity (moderate), and Ecotoxicology (low)

SYNONYMS

● CYCLOPENTASILOXANE
● CYCLOPENTASILOXANE, DECAMETHYL-
● DECAMETHYL- CYCLOPENTASILOXANE
● DECAMETHYLCYCLOPENTASILOXANE

Unacceptable

Unacceptable: EWG VERIFIED products cannot contain this ingredient

Cyclopentasiloxane (cyclomethicone) is a silicon-based cyclic compound; may be associated with environmental toxicity.

Common concerns

See how this product scores for common concerns.

  • LOW
    Cancer
  • LOW
    Allergies & Immunotoxicity
  • LOW
    Developmental and Reproductive Toxicity
  • LOW
    Use Restrictions

Ingredient concerns

  • CONCERNS
  • DATA SOURCES

Products with this Ingredient

Expand content Collapse content
foundation1156 products
concealer599 products
lipstick419 products
eye shadow377 products
eye liner311 products
antiperspirant/deodorant277 products
hair treatment/serum199 products
facial moisturizer/treatment159 products
lip liner155 products
moisturizer151 products
antiperspirant/deodorant (men's)149 products
conditioner130 products
makeup primer126 products
blush103 products
daily use with SPF103 products
brow liner95 products
recreational sunscreen81 products
hair styling aide69 products
shampoo63 products
serums & essences62 products
CC cream60 products
hair spray56 products
bronzer/highlighter56 products
lip gloss56 products
around-eye cream54 products
mascara53 products
mask53 products
BB cream47 products
hand cream34 products
27 products
anti-aging22 products
makeup remover22 products
styling gel/lotion17 products
body firming lotion15 products
lip balm14 products
styling mousse/foam12 products
sunless tanning12 products
eye makeup remover10 products
detangler10 products
baby sunscreen10 products
facial cleanser8 products
facial powder7 products
after shave7 products
setting powder/spray7 products
lip plumper6 products
beard oil6 products
lip balm with SPF6 products
exfoliant/scrub5 products
body oil5 products
hair color and bleaching4 products
toners/astringents4 products
other eye makeup4 products
beard care4 products
nail treatment3 products
baby lotion3 products
shaving cream (men's)2 products
skin fading/lightener2 products
body spray2 products
foot moisturizer2 products
body wash/cleanser2 products
cuticle treatment2 products
fragrance for women2 products
makeup removing wipes2 products
oil controller1 products
nail polish1 products
baby oil1 products
after sun product1 products
tanning oil1 products
bath oil/salts/soak1 products
shaving cream1 products
hair removal waxes1 products
damaged skin treatment1 products
eyelash glue1 products

Persistence and bioaccumulation

Expand content Collapse content
CONCERN REFERENCE
Persistent, bioaccumulative in wildlife and humansOpen scientific literature
Persistent, bioaccumulative in wildlifeCanada PBTs - Accelerated Reduction/Elimination of Toxics (ARET)

Organ system toxicity (non-reproductive)

Expand content Collapse content
CONCERN REFERENCE
Classified as expected to be toxic or harmfulEnvironment Canada Domestic Substance List

Cancer

Expand content Collapse content
CONCERN REFERENCE
One or more animal studies show tumor formation at moderate dosesOpen scientific literature

Neurotoxicity

Expand content Collapse content
CONCERN REFERENCE
One or more animal studies show any effects at moderate dosesOpen scientific literature

Endocrine disruption

Expand content Collapse content
CONCERN REFERENCE
One or more animal studies show endocrine disruption at moderate dosesOpen scientific literature

Ecotoxicology

Expand content Collapse content
CONCERN REFERENCE
Suspected to be an environmental toxin and be persistent or bioaccumulativeEnvironment Canada Domestic Substance List
Suspected to be an environmental toxinEnvironment Canada Domestic Substance List

Data gaps

Expand content Collapse content
CONCERN REFERENCE
119 studies in PubMed science library may include information on the toxicity of this chemicalNLM PubMed

Informational

Expand content Collapse content
CONCERN REFERENCE
Industry or government recommendations for safe use: restrictions on concentration, impurities, product types, or manufacturing methods - anyCosmetic Ingredient Review Assessments
  • Open scientific/peer reviewed literature
  • EC (Environment Canada). 1994. Accelerated Reduction/Elimination of Toxics (ARET). ARET substance list of persistent, bioaccumulative and toxic chemicals.
  • EC (Environment Canada). 2008. Domestic Substances List Categorization. Canadian Environmental Protection Act (CEPA) Environmental Registry.
  • NLM (National Library of Medicine). 2012. PubMed online scientific bibliography data. http://www.pubmed.gov.
  • CIR (Cosmetic Ingredient Review). 2006. CIR Compendium, containing abstracts, discussions, and conclusions of CIR cosmetic ingredient safety assessments. Washington DC.

Understanding scores

Cosmetics and personal care products are not required to be tested for safety before being allowed on the market. The Skin Deep® scoring system was designed to help the public understand whether a product is safe to use or whether it contains ingredients of concern.

Every product and ingredient in Skin Deep gets a two-part score – one for hazard and one for data availability. The safest products score well by both measures, with a low hazard rating and a fair or better data availability rating.

HOW WE DETERMINE SCORES

Hazard score

The Skin Deep ingredient hazard score, from 1 to 10, reflects known and suspected hazards linked to the ingredients. The EWG VERIFIED™ mark means a product meets EWG’s strictest criteria for transparency and health.

Score legend
WEIGHT-OF-EVIDENCE APPROACH

A product’s hazard score is not an average of the ingredients’ hazard scores. It is calculated using a weight-of-evidence approach that factors in all of the hazards or health impacts associated with the ingredients.

Data availability

The Skin Deep data availability rating reflects the number of scientific studies about the product or ingredient in the published scientific literature.

NONE LIMITED FAIR GOOD ROBUST
Low Availability
Moderate Availability
High Availability
NONE

Ingredients have not been assessed.

LIMITED-FAIR

There is only a modest volume of research.

GOOD-ROBUST

Ingredients have been studied extensively.

Can’t find your product?

Enter the ingredients in EWG’s Build Your Own Report tool to get an approximate score for that product.

BUILD YOUR OWN REPORT

News & updates

Big Market for Black Cosmetics, but Less-Hazardous Choices Limited
RESEARCH
Big Market for Black Cosmetics, but Less-Hazardous Choices Limited
K-Beauty Trends: Serums, Essences and EWG’s Best Bets
RESEARCH
K-Beauty Trends: Serums, Essences and EWG’s Best Bets
FDA Asks Women To Protect Themselves From Products The Agency Refused To Ban
NEWS RELEASE
FDA Asks Women To Protect Themselves From Products The Agency Refused To Ban
Study Highlights Importance of Cosmetics Ingredient Safety Tests
NEWS RELEASE
Study Highlights Importance of Cosmetics Ingredient Safety Tests
READ ALL ARTICLES
Skindeep Healthy Living App

EWG research
on the go

Find personal care, cleaning, and food products on the EWG Healthy Living app.

DOWNLOAD THE APP