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Ingredients

Ingredient Dictionary

SODIUM SULFIDE

Molecular structure

Definition

US FDA substance register · UNII YGR27ZW0Y7 · registered name Sodium sulfide anhydrous · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Dissolves hair to remove itDEPILATORY

Safety & regulatory references

Restricted or banned
China · South Korea

Source: MFDS (Korea) cosmetic regulatory information

Argentina · Brazil

  • Field of application and/or use : (a) (b) and Depilatories
  • Maximum concentration permitted at final product : a.- 2% calculated as sulfur pH up to 12.7 b.- 6% calculated as sulfur pH to 12.7
  • Use conditions and warnings that must appear on the label : a.- b.- and Keep out of the reach of children. Avoid contact with eyes.

ASEAN

  • Field of application and/or use : (a) Depilatories (b) Depilatories
  • Maximum authorised concentration in the finished cosmetic product : (a) 2% calculated as sulphur pH up to 12.7 (b) 6% calculated as sulphur pH up to 12.7
  • Conditions of use and warning which must be printed on the labels : (a) • Keep out of reach of children • Avoid contact with eyes (b) • Keep out of reach of children • Avoid contact with eyes

Canada

  • Conditions of Use by product type : In hair removal (depilatory) products
  • Maximum Concentration Permitted : 2% as sulfur

European Union

  • Product Type, body parts : (a) Depilatories (b) Depilatories
  • Maximum concentration in ready for use preparation : (a) 2% (as sulphur) (b) 6% (as sulphur)
  • Other : pH<=12.7
  • Wording of conditions of use and warnings : (a) (b) Keep out of reach of children Avoid contact with eyes

Source: MFDS (Korea) cosmetic regulatory information

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

Source: Korea toxic substances GHS register (NIER)

Restriction III/23 · Other restriction: ban substances that deplete the ozone layer

Source: EU CosIng ingredient list

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

Names & identifiers

SODIUM SULFIDEINCI소듐설파이드Korean label name (MFDS standard)Sodium sulfide (Na2S)Synonym
CAS No.chemical registry number
1313-82-2
EC No.EU chemical inventory number
215-211-5
DTXSIDUS EPA chemical ID
DTXSID0029636
DTXCIDUS EPA compound ID
DTXCID601030496
IUPAC
Disodium sulfide
Molecular formula
Na2S
Molecular weight
78.04 g/mol

Measured properties

Appearance
Sodium sulfide, hydrated, with not less than 30% water appears as yellow-pink or white deliquescent crystals, flakes or lumps. Contains at least 30% water. Alkaline. Burns skin, eyes and mucous membranes. Mildly corrosive to most metals. May be toxic by skin absorption. Releases toxic hydrogen sulfide gas when mixed with an acid. · Wet Solid, Other Solid, Dry Powder, CBI, Large Crystals, Liquid
Vapour pressure
(4.59E-17mmHg @ 25℃ (est.))
Water solubility
18.6 g/100㎖ (20℃)
Relative density
1.856 (14℃)
n-Octanol/water partition coefficient (Kow)
-3.5
Auto-ignition temperature
(&amp, gt, 480℃)
Decomposition temperature
920 ℃
Molecular weight
78.04

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: PubChem · KOSHA safety data sheets (Korea)

What products actually use it for

What the 15 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.

  • Processing aids not otherwise specified4
  • Intermediate3
  • Solids separation (precipitating) agent, not other2
  • Depilatory (EPA)1
  • Reducing agent1
  • Cleaning agent1
  • Lubricating agent1
  • Tanning agents not otherwise specified1
1 other uses
  • Density modifier1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

4 skin studies and 2 eye studies are on record.

Classed as highly irritating1

The study conclusions largely agree (100%). These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 6 studies
  • Classification not possible
    Skin Sensitization · Screening
  • Skin Corr. 1B
    Skin Irritation · Authoritative
  • Category 8.2B (Category 1B)
    Skin Irritation · Read Across
  • Category 1A-1C
    Skin Irritation · Screening
  • Category 8.3A (Category 1)
    Eye Irritation · Read Across
  • Category 1
    Eye Irritation · Screening

Source: US EPA CompTox dashboard

Related literature

Linked databases 19