POTASSIUM HYDROXIDE

Potassium hydroxide is an alkali metal hydroxide.

Source: PubChem

US FDA substance register · UNII WZH3C48M4T · registered name Potassium hydroxide · single chemical substance

Source: US FDA Unique Ingredient Identifier (UNII)

Potassium Hydroxide is the inorganic base

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) Removers cuticles (b) Hair strengthener: 1. General use 2. Professional use (c) To adjust pH depilatories d) For pH adjustments in other products
• Maximum concentration permitted at final product : (a) 5% mass (b) 1. 2% in mass 2. 4,5% in mass b: the sum of the calculated mass hydroxides such as sodium hydroxide (c) to pH 12.7 d) to pH 11
• Use conditions and warnings that must appear on the label : a) - Contains alkali - Avoid contact with eyes - Can cause blindness - Keep out of reach of children b) 1 and 2 - Contains alkali - Avoid contact with eyes - Can cause blindness - Keep out of reach of children - For professional use only (if applicable) c) - Keep out of reach of children - Avoid contact with eyes

ASEAN

• Field of application and/or use : (a) Nail cuticle solvent (b) Hair straightener 1. General use 2. Professional use (c) pH adjuster – for depilatories (d) Other uses as pH adjuster
• Maximum authorised concentration in the finished cosmetic product : (a) 5% by weight (4) (b) 1. 2% by weight (4) 2. 4.5% by weight (4) (c) up to pH 12.7 (d) up to pH 11
• Conditions of use and warning which must be printed on the labels : (a) • Contains alkali • Avoid contact with eyes • Can cause blindness • Keep out of reach of children (b) 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 (c) • Keep out of reach of children • Avoid contact with eyes

China

• Maximum concentration : (a) 5%
• (b)
• 1. 2%
• 2. 4.5%
• (c) pH≤12.7
• (d) pH≤11
• (b)

European Union

• Product Type, body parts : (a) Nail cuticle solvent (b) Hair straightener (c) pH adjuster for depilatories (d) Other uses as pH adjuster 15d- Callosity softener/remover
• Maximum concentration in ready for use preparation : (a) 5.0% (5) (b) 1. 2% (5) 2. 4.5% (5) 15d- 1.5% (5)
• Other : (b) 1. General use 2. Professional use (c) up to pH 12.7 (d) up to pH 11 15 d Contains alcakali, Avoid contact with eyes Keep out of reach of chindren ans Read directions for use carefully
• Wording of conditions of use and warnings : (a) Contains alkali Avoid contact with eyes Can cause blindness Keep out of reach of children (b) 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 (c) Keep out of reach of children Avoid contact with eyes

Korea’s toxic-substance GHS classification: Danger · H301 (category 3) · H314 (category 1A)

Source: Korea toxic substances GHS register (NIER)

Restriction III/15a, 15d · SCCS opinion: Opinion on Potassium hydroxide (KOH) as callosity softener/remover

Source: EU CosIng ingredient list

Reviewed by CIR: Safety Assessment of Inorganic Hydroxides as Used in Cosmetics

Source: US Cosmetic Ingredient Review (CIR)