Zinc Pyrithione 48%

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Zinc Pyrithione (ZPT) has antibacterial and anti-fungal properties and is effective against many pathogens. It can be used as a preservative in formulations, but can also be included into hair care formulations as a hair conditioning agent that can improve the texture of hair as well as preventing and treating dandruff. It can be used in skin care products to control seborrheic dermatitis and psoriasis. This product can be used in personal care and cosmetic products in the formulation of cleansing products, hair conditioners, shampoos, eyeliners, face powders and skin care products.

ZPT is extremely effective in eliminating the fungi, Malassezia spp., which is directly linked to the scalp condition, dandruff. An important characteristic of this molecule is that it is efficacious against numerous other organisms beyond Malassezia, including the various bacteria species associated with producing odor on the skin.  The product does link with iron molecules to produce a coloured compound so its important to remove Fe from your formulation by sequestering.  The fine particle size of ZPT dispersion can effectively prevent precipitation and double the antimicrobial effect.

If this is used to make anti-dandruff claims please check with TGA regulations

Additional information

Weight N/A
Dimensions N/A

0.05 kg (50g), 0.10 kg (100g), 0.25kg (250 g)

Technical Data

  • Antimicrobials
  • Preservatives
CAS Number  13463-41-7
EINECS/ELINCS No:  236-671-3
Appearance  Dispersion, Aqueous
Color  Off-white
Product Status  COMMERCIAL
Applications/ Recommended for  Hair care (Shampoos, Conditioners & Styling)
Regulatory Status  US, EU

Formulation Guidelines

–  Maintain pH between 5.0 and 8.5
– Maintain process temperatures which are normal to body wash  manufacturing; Zinc Omadine® has shown to be stable for > 2 hours  at 100°C
– Incorporate after blending of other ingredients, just prior to fragrance and preservative addition
– Complete homogenization is a critical and final step

Incompatibilities with Zinc Omadine®
– Strong chelators, such as EDTA, can chelate the zinc forming soluble  ionic pyrithione
– Cationic polymers can neutralize the negative charge on the ZPT molecule causing agglomeration. The positive charge of the cationic polymer must be neutralized by an anionic in the formulation prior to the addition of Zinc Omadine®
– Iron salts, even at trace levels, can cause a grey to purple color in a body wash formulation due to the formation of ferric pyrithione



In the EU, odour control is a cosmetic application not a biocidal application (BPR). Zinc pyrithione is a listed preservative in EU Cosmetic Reg Annex V and allowed in rinse off products only. For products other than those  for hair, it is permitted up to 0.5%. It is  recommended for an upper use level of 0.25% zinc pyrithione for whole body rinse off products.


Zinc Omadine®  is a trademark from Arch Chemicals Inc