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Ingredients

Ingredient Dictionary

LITHIUM HYDROXIDE

Lithium hydroxide is an alkali metal hydroxide.

Korean limit
4.5%
Molecular structure

Definition

Lithium hydroxide is an alkali metal hydroxide.

Source: PubChem

US FDA substance register · UNII 903YL31JAS · registered name Lithium hydroxide anhydrous · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Cosmetic roles

Curls or straightens hairHAIR WAVING OR STRAIGHTENINGKeeps pH steadyBUFFERING

Safety & regulatory references

Restricted
South Korea · Taiwan · United Kingdom

Source: ASEAN Cosmetic Directive · EU Cosmetics Regulation · MFDS (Korea) cosmetic regulatory information · Taiwan FDA cosmetic ingredients · Taiwan FDA cosmetic regulations · UK cosmetics regulations (OPSS)

Argentina · Brazil

  • Field of application and/or use : (a) hair straighteners 1. General Use 2. Professional use (b) To adjust pH depilatories (c) For pH adjustment in other products (only for products intended to be rinsed)
  • Maximum concentration permitted at final product : to) 1. 2% by mass 2. 4.5% by mass (a) 1 and 2 The concentration of lithium hydroxide is calculated by weight sodium hydroxide. In the case of mixtures, the sum should not exceed the maximum authorized concentration in the final product (b) Up to pH 12.7 (c) Up to pH 11
  • Use conditions and warnings that must appear on the label : a) 1. Contains alkali Avoid contact with eyes. Can cause blindness. Keep out of the reach of children. a) 2. For professional use onlyContains alkali Avoid contact with eyes. Can cause blindness b) and c) Contains alkali. Avoid contact with eyes. Keep out of reach of children

ASEAN

  • Field of application and/or use : (a) Hair straightener 1. General use 2. Professional use (b) pH adjuster – for depilatories (c) Other uses as pH adjuster (for rinse-off products only)
  • Maximum authorised concentration in the finished cosmetic product : (a) 1. 2% by weight (6) 2. 4.5% by weight (6)
  • Other limitations and requirements : (a) pH value not to exceed pH 12.7 (b) pH value not to exceed pH 11
  • Conditions of use and warning which must be printed on the labels : (a) 1. • Contains alkali • Avoid contact with eyes • Can cause blindness • Keep out of reach of children 2. • For Professional use only • Avoid contact with eyes • Can cause blindness (b) • Contains alkali • Keep out of reach of children • Avoid contact with eyes

China

  • Maximum concentration : (a)
  • 1. 2%
  • 2. 4.5%
  • (b) pH≤12.7
  • (c) pH≤11

European Union

  • Product Type, body parts : (a) Hair straightener (b) pH ajuster for depilatories (c) Other uses as pH ajuster (for rinse-off products only)
  • Maximum concentration in ready for use preparation : (a) 1. 2% (6) 2. 4.5% (6)
  • Other : (a) 1. General use 2. Professional use (b) pH < 12.7 (c) pH < 11
  • Wording of conditions of use and warnings : (a) 1. Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children 2. Avoid contact with eyes Can cause blindness (b) Contains alkali Keep out of reach of children Avoid contact with eyes

Source: MFDS (Korea) cosmetic regulatory information

Korea’s toxic-substance GHS classification: Danger · H314 (category 1B)

Source: Korea toxic substances GHS register (NIER)

EU Cosmetics Regulation, Annex III (restricted substances), entry 15b · maximum concentration (a) 1. 2% (6) 2. 4.5% (6) · applies to (a) Hair straightener (b) pH ajuster for depilatories (c) Other uses as pH ajuster (for rinse-off products only)

Source: EU restricted substances (Annex III)

Restriction III/15b

Source: EU CosIng ingredient list

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

Names & identifiers

LITHIUM HYDROXIDEINCI리튬하이드록사이드Korean label name (MFDS standard)Lithium hydroxide (Li(OH))Synonym
CAS No.chemical registry number
1310-65-2
EC No.EU chemical inventory number
215-183-4
DTXSIDUS EPA chemical ID
DTXSID70893845
DTXCIDUS EPA compound ID
DTXCID801323885
IUPAC
Lithium hydroxide
Molecular formula
HLiO
Molecular weight
23.95 g/mol

Measured properties

Appearance
solid
pH
(14)
Melting/freezing point
(450 C)
Water solubility
(12.8%)
Relative density
(2.5)
Molecular weight
(23.95)

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.

  • Processing aids not otherwise specified4
  • Intermediate3
  • Lubricating agent2
  • Absorbent2
  • Dye2
  • Hair waving or straightening (EPA)1
  • Viscosity modifier1
  • pH regulating agent1
1 other uses
  • Catalyst1

Source: US EPA CompTox dashboard

Irritation and sensitisation studies

7 skin studies and 3 eye studies are on record.

Classed as highly irritating1Classed as low2

The studies disagree (the most common conclusion covers 33%), so they do not establish that this ingredient is irritating. These tests are on the raw material itself; irritation at the amount in a finished product is a different question.

See all 10 studies
  • Classification not possible
    Skin Sensitization · Screening
  • Category 1
    Skin Irritation · Screening
  • Category 6.3A (Category 2)
    Skin Irritation · Read Across
  • Not likely to be sensitizing
    skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation) 1981 according to EU Method B.6 (Skin Sensitisation) 1987 according to EPA OPP 81-6 (Skin Sensitisation) 1984
  • Skin corrosion/irritation - Category 1
    Skin Irritation · Screening
  • Category 8.2B (Category 1B)
    Skin Irritation · Read Across
  • Not likely to be sensitizing
    skin sensitisation: in vivo (non-LLNA) · Screening · according to OECD Guideline 406 (Skin Sensitisation) 1992 according to EU Method B.6 (Skin Sensitisation) 1992 according to EPA OPP 81-6 (Skin Sensitisation) 1984
  • Category 6.4A (Category 2A)
    Eye Irritation · Read Across
  • Category 1
    Eye Irritation · Screening
  • Category 8.3A (Category 1)
    Eye Irritation · Read Across

Source: US EPA CompTox dashboard

Related literature

Linked databases 25