Ingredient Dictionary

LACTOSE

Lactose is a glycosylglucose disaccharide, found most notably in milk, that consists of D-galactose and D-glucose fragments bonded through a beta-14 glycosidic linkage.

How much products actually contain

10 products state the amountmedian 0.0003%

under 0.01% 10
0.01–0.1% 0
0.1–1% 0
1% or more 0

Amounts are mostly stated by products named after the ingredient, so they may lean towards token amounts.

Of the products containing it, 11 list it before the 1% line and 27 after it (usually 1% or less).

Products using this ingredient

12 of 37 confirmed · likeliest to carry enough first · See all 37

Definition

Lactose is a glycosylglucose disaccharide, found most notably in milk, that consists of D-galactose and D-glucose fragments bonded through a beta-14 glycosidic linkage. The glucose fragment can be in either the alpha- or beta-pyranose form, whereas the galactose fragment can only have the beta-pyranose form. It has a role as a human metabolite.

Source: PubChem

US FDA substance register · UNII 3SY5LH9PMK · registered name Anhydrous lactose · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Keeps skin in good condition (CosIng catch-all)SKIN CONDITIONINGDraws in and holds moistureHUMECTANT

Safety & regulatory references

Not classified under Korea’s toxic-substance GHS list · existing chemical substance

Source: Korea toxic substances GHS register (NIER)

Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

Reviewed by CIR: Safety Assessment of Monosaccharides, Disaccharides and Related Ingredients as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)

More data — names, identifiers, properties, test records, literature

Official labels & definitions

JCIA labelling name 乳糖: 本品は、次の化学式で表される二糖類である。

Source: JCIA labelling names (Japan)

Names & identifiers

LACTOSEINCI락토오스Korean label name (MFDS standard)D-Glucose, 4-O-.beta.-D-galactopyranosyl-Synonym乳糖Japanese labelling name

CAS No.chemical registry number: 63-42-3
EC No.EU chemical inventory number: 200-559-2
EC No.EU chemical inventory number: 232-837-4
DTXSIDUS EPA chemical ID: DTXSID2023193
DTXCIDUS EPA compound ID: DTXCID403193

IUPAC: 4-O-beta-D-Galactopyranosyl-beta-D-glucopyranose
Molecular formula: C12H22O11
Molecular weight: 342.297 g/mol

Measured properties

Appearance: solid
Colour: white
Odour: odourless
Melting/freezing point: 201~202 ℃
Initial boiling point and range: 592 ℃
Vapour pressure: 0.0000000000000000809 ㎜Hg (at 25 ℃)
Water solubility: 195000 ㎎/ℓ (at 20 ℃)
Relative density: 1.5
n-Octanol/water partition coefficient (Kow): -5.03
Molecular weight: 360.32

Values measured on the substance itself. The KOSHA data are a reference for writing and reviewing safety data sheets, not a specification for a commercial raw material.

Source: KOSHA safety data sheets (Korea)

What products actually use it for

What the 17 products reported to the US EPA with this ingredient use it for. Products outside cosmetics are included, so the top few rows are its main uses.

Flavouring and nutrient4
Humectant3
Softener and conditioner2
Thickening agent2
Fragrance1
Lubricating agent1
Oxidizing agent1
Processing aids not otherwise specified1

2 other uses

Solvent1
Surfactant (surface active agent)1

Source: US EPA CompTox dashboard