Is Undeceth-5 safe in cosmetics?
Undeceth-5 has a safety rating of "GOOD" in our database. EU status: permitted. US status: permitted.
Good
Cosmetic Ingredient
Undeceth-5
Also known as: Polyethylene glycol monoundecyl ether, Polyethylene glycol undecenyl ether, Polyethylene glycol undecyl ether, Polyoxyethylene undecyl ether, alpha -Undecyl-omega -hydroxypoly(oxyethylene) (+15 more)
INCI: UNDECETH-5
Undeceth-5 (CAS 34398-01-1) is a cosmetic cosmetic ingredient functioning as Surfactant (cleansing), surfactant (emulsifying), nonionic surfactant. EU Regulation 1223/2009 status: permitted. Industrial safety data is also available in the chemical safety database. Same-CAS public records also appear in industrial chemical safety data.
View industrial chemical safety profile for CAS 34398-01-1 →
Auto-generated CPSR Part A draft with source citations
Function
Surfactant (cleansing), surfactant (emulsifying), nonionic surfactant
Safety Rating
GOOD
Chemistry & Identifiers
IUPAC Name
2-undecoxyethanol
InChIKey
KLMGMPDXSPSCOC-UHFFFAOYSA-N
Regulatory Status
EU EU Status
permitted
US US Status
permitted
US Notes
Permitted for cosmetic use; no specific restrictions
For full compliance data across multiple jurisdictions, use the Substance Compliance tool.
Safety Data
Margin of Safety, dermal absorption, and sensitization profile summaries for Undeceth-5.
Calculate MoS for your specific formulation with the MoS Calculator.
Function Categories & List Membership
Cosmetic/Chemical Function Categories
Cleaning agent
Dispersing agent
Emulsifier
Fragrance
Softener and conditioner
Surfactant (surface active agent)
Wetting agent (non-aqueous)
Regulatory List Membership (2)
IFRA Fragrance Transparency List
EPA Safer Chemical Ingredients List (SCIL)
Expert Verdict
Expert safety assessment and concern-level summary for Undeceth-5.
Regulatory Flags
epa_safer_alternative
ifra_fragrance
Known Synonyms
Polyethylene glycol monoundecyl ether
Polyethylene glycol undecenyl ether
Polyethylene glycol undecyl ether
Polyoxyethylene undecyl ether
alpha -Undecyl-omega -hydroxypoly(oxyethylene)
Poly-(oxy-1,2-ethanediyl)-alpha-undecyl-omega-hydroxy
alpha-Alkyl-omega-hydroxypoly(oxypropylene) and/or poly(oxyethylene) polymers where the alkyl chain contains a minimum of six carbons, minimum number average molecular weight (in amu) 1,100
Poly(oxy-1,2-ethanediyl), .alpha.-undecyl-.omega.-hydroxy-
Poly(oxy-1,2-ethanediyl), alpha-undecyl-omega-hydroxy-
UNII-3O5BS8YJVJ
UNII-DMW92U6F5Q
UNII-UJH7UP3N2C
UNII-1L8BC88W0T
UNII-88N9U3LCRX
UNII-O0A3UHI7NO
UNII-O4FEY2ZTBO
UNII-1I9FH814TU
UNII-3B59X0I14C
UNII-C02RQ2HC6W
UNII-D7G4X9689X
Chemical Function
Surfactant (surface active agent)
Softener and conditioner
Emulsifier
Regulatory Lists
fracking; water
IFRA Transparency
inert_ingredient; non_food_use; Pesticides
SCIL (9/2019)
Australian Status
AICIS status: listed_with_terms
Specific information requirements: Obligations to provide information apply. You must tell us within 28 days if the circumstances of your importation or manufacture (introduction) are different to those in our assessment.
Frequently Asked Questions
Is Undeceth-5 allowed in the EU?
Undeceth-5 EU regulatory status: permitted. This is based on EU Regulation 1223/2009 and its amendments.
What does Undeceth-5 do in cosmetics?
Undeceth-5 functions as: Surfactant (cleansing), surfactant (emulsifying), nonionic surfactant. It is classified as a cosmetic ingredient in our database. CAS number: 34398-01-1.
Is Undeceth-5 used outside cosmetics?
Undeceth-5 also appears in industrial chemical safety data. The cross-vertical cards on this page render same-CAS public rows from the matched databases.
Compliance Tools
Check Undeceth-5 compliance across multiple jurisdictions:
Ingredient Decoder
Paste a full ingredient list for instant analysis
82 Allergen Checker
Check for EU declarable fragrance allergens
Substance Compliance
Check compliance across multiple jurisdictions
MoS Calculator
Calculate Margin of Safety using SCCS methodology
Heavy Metal Limits
Compare limits across jurisdictions
Related Ingredients
Alpha-Glucan Oligosaccharide-1
Excellent
Same category
Skin conditioning, cleansing, smoothi...
Ammonium Acryloyl Dimethyltaurate/Carboxyethyl Acrylate Crosspolymer
Excellent
Same category
Dispersing agent (nonsurfactant), vis...
Ammonium Cocoyl Isethionate
Excellent
Same category
Surfactant – cleansing, foaming
Ammonium Lauryl Sulfosuccinate
Excellent
Same category
Cleansing, foaming, surfactant
Ammonium Stearate
Excellent
Same category
Cleansing, surfactant, emulsifying
Apricot Kernel Oil Polyglyceryl-10 Esters
Excellent
Same category
Skin conditioning, emollient, surfact...
(AGARICUS BLAZEI FERMENT + GANODERMA LUCIDUM FERMENT + GANODERMA MULTIPILEUM FERMENT) EXTRACT
Good
Similar safety
Anti-sebum, Antioxidant, Skin Protecting
(ANGELICA ACUTILOBA/PAEONIA LACTIFLORA/REHMANNIA GLUTINOSA) ROOT/CNIDIUM OFFICINALE RHIZOME EXTRACT
Good
Similar safety
Skin Conditioning, Skin Conditioning ...
(ANGELICA ACUTILOBA/PAEONIA LACTIFLORA/REHMANNIA GLUTINOSA/SCUTELLARIA BAICALENSIS) ROOT/(CNIDIUM OFFICINALE/COPTIS CHINENSIS) RHIZOME/GARDENIA JASMINOIDES FRUIT/PHELLODENDRON CHINENSE BARK EXTRACT
Good
Similar safety
(ANGELICA GIGAS/GLYCYRRHIZA URALENSIS/REHMANNIA GLUTINOSA ROOT)/ANGELICA GIGAS STEM/CARTHAMUS TINCTORIUS FLOWER/(CARTHAMUS TINCTORIUS/PRUNUS PERSICA SEED)PORIA COCOS WATER
Good
Similar safety
Humectant, Skin Conditioning, Skin Pr...
(ANGELICA KEISKEI/CHRYSANTHEMUM ZAWADSKII) LEAF/STEM/CINNAMOMUM CASSIA BARK/TRICHOSANTES KIRILOWII FRUIT/ULMUS DAVIDIANA BARK/ROOT/(PAEONIA JAPONICA/BUPLEURUM FALCATUM/POLYGALA TENUIFOLIA ROOT)/VISCUS ALBUM STEM EXTRACT
Good
Similar safety
Anti-seborrheic, Anti-sebum, Antioxid...
(APPLE/CITRUS JUNOS/LENTIL/PEAR/PUMPKIN/STRAWBERRY/TOMATO FRUIT)/CORN KERNEL/(ARCTIUM LAPPA/BRASSICA OLERACEA ACEPHALA/CABBAGE/CAMELLIA SINENSIS/MORINGA OLEIFERA/RADISH/SPINACH LEAF)/(SORGHUM BICOLOR LEAF/STEM)/OAT MEAL/POTATO PULP/(CARROT/NELUMBO NUCIFERA/RADISH/WILD YAM ROOT)/(AMARANTHUS HYPOCHONDRIACUS/CASHEW/CICER ARIETINUM/COIX LACRYMA-JOBI MA-YUEN /MACADAMIA TERNIFOLIA/PHASEOLUS ANGULARIS/PISTACIA VERA/RHYNCHOSIA NULUBILIS/RICE/SESAME/SETARIA ITALICA/SOYBEAN/SWEET ALMOND/WHEAT SEED)/HORDEUM VULGARE SPROUT/CYPERUS ESCULENTUS TUBER/ARTEMISIA PRINCEPS/BROCCOLI/CHENOPODIUM QUINOA/ENTEROMORPHA COMPRESSA/HORDEUM VULGARE/IPOMOEA BATATAS/LAMINARIA JAPONICA/LENTINUS EDODES/PLEUROTUS OSTREATUS/PORPHYRA TENERA/UNDARIA PINNATIFIDA EXTRACT
Good
Similar safety
Antioxidant
Laureth-2 Acetate
Moderate
Chemical family
Emollient, skin-conditioning agent (e...
Undeceth-10
Good
Chemical family
Cleansing, solvent, surfactant (clean...
Undeceth-11
Good
Chemical family
Skin conditioning, skin conditioning ...
Is Undeceth-5 in Your Products?
Scan any product label with Piro — our free ingredient scanner. Point your camera at the ingredients list and get instant safety scores for every ingredient.
Try Piro Free →Analyze Your Full Ingredient List
Paste any INCI list into the Decoder for instant safety analysis, or calculate the Margin of Safety for Undeceth-5 in your formulation.