Isocil® PC

Isocil® PC is a combination of two commonly used personal care preservatives, Methyl chloroisothiazolinone and Methylisothiazolinone (MI/CMI). These traditional preservatives have been used for years offering excellent broad spectrum efficacy at low use levels. With the added benefit of a strong safety profile as well as toxicological data, this chemistry is appealing amongst many formulators.

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Technical data sheet (TDS)
Product brochure
See all documents (3)


Features And Benefits
Globally recognized
Trusted broad spectrum protection
Easy to use liquid product
Compatible and soluble in most personal care raw materials
Has a wide range of global regulatory approval
Regional Availability
North America
Asia Pacific
Regulatory Status
China Compliant
Product Characteristics
Physical Form
Formulation Conditions
Use Level
0.05-0.1% (Regional limits apply)
Soluble in
Miscible In
Cosmetic solvents
Application pH Range

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Technical product information

Key Attributes
  • MI/CMI blend
  • Broad spectrum preservation
  • Easy to use liquid product
  • Compatible and soluble in most personal care raw materials
  • Cost effective
  • Clear liquid aqueous solution
  • Has a wide range of global regulatory approval
  • Traditional Efficacious Preservation
Compositional Breakdown

  • Anhydrous
  • Baby care
  • Baby wipes
  • Body wash
  • Conditioner
  • Cream
  • Deo/ Anti-Perspirant
  • Eye creams/gel
  • Eye shadow
  • Face Lotion
  • Face wipes
  • Facial Cream
  • Foundation
  • Hair gel
  • Hand soap (non anti-bac)
  • Lotion
  • Make up remover
  • Mascara
  • Oil in Water
  • Powder
  • Shampoo
  • Suncare
  • Toner
  • Water in Oil

Microbiological Challenge Studies
Studies were run using different concentrations of Isocil® PC in various formulations to see efficacy against various bacteria, yeast and fungi compared to other commercial isothiazolinones. All samples were inoculated at the beginning of the study, sampled at 24 hours, 3, 7, 10, 14, 21 and 28 days.

Shampooo Formula

Isocil® PC vs. Competitive Isothiazolinone – Shampoo Mixed Inoculum-Bacteria

Mixed Inoculum consists of P. aeruginosa, S. aureus, and E. coli

Isocil® PC vs. Competitive Isothiazolinone – Shampoo Mixed Inoculum-Fungi

Mixed Inoculum consists of C.albicans and A. niger

Formulation Recommendations
  • Miscible in water, glycols, most personal care solvents
  • Reducing agents, amines and strong nucleophiles will reduce activity of MCI/MI
  • Surfactants should be checked for residual bisulfite before addition
  • When used with amines, pH should be below 6 before addition
  • Should be added during the cool down phase of processing, at temperature of 50°C or below
  • Wide range pH: 3–9
  • Product pH (as is) is 3.0; should be handled with care due to acidity
Global Regulatory


  • Listed in Annex V to Regulation EC/1223/2009
  • Not permitted for leave-on products. Maximum use level of 0.0015 % CMI/MI for rinse-off applications


  • Listed in the positive list
  • Max use level of 0.01% CMI/MI for rinse-off
  • Not permitted in leave-on


  • Approved by PCPC for both rinse-off and leave-on applications
  • Max level of 0.00075% CMI/MI (7.5 ppm active ingredients) in leave-on products
  • Max level of 0.0015% CMI/MI (15 ppm active ingredients) in rinse-off products
General Information

Not allowed for oral hygiene and lip products or in preparations for children under the age of 3

412 Mt. Kemble Avenue
Morristown, NJ 07960
United States