ISO 8124-12:2023

Overview

ISO 8124-12:2023 - Safety of toys - Part 12: Microbiological safety - sets international criteria for the microbiological cleanliness and preservation effectiveness of toy materials that are, contain or are supplied with aqueous media (e.g., paste, putty, liquid, gel) or cosmetic-like products intended for use on children or toys. It covers powders meant to be mixed with water and applies to the condition of the toy as received by the consumer (unopened and undamaged). The standard is intended to reduce infection risks from contaminated toys and complements other toy-safety and microbiology standards.

Key topics and technical requirements

• Scope & exclusions: Applies to aqueous toy materials and cosmetic-type toy products; excludes inaccessible materials during normal use, powder-like biological demonstration materials (e.g., seeds, soil), and food.
• Risk assessment: Manufacturers must evaluate formulations for susceptibility to microbial growth using ISO 29621 guidance and water activity testing (products with water activity < 0.5 are typically low risk).
• Microbiological cleanliness limits:
  • Infant products, face paints, and products for eye/mucous membrane areas: maximum 100 CFU/ml or CFU/g for total aerobic mesophilic count (TAMC) and total yeast and mould count (TYMC).
  • All other products: maximum 1 000 CFU/ml or CFU/g.
  • Bile‑tolerant gram‑negative bacteria: max 100 CFU/ml or CFU/g for all products.
  • Absence (<1 CFU/g) required for: Pseudomonas aeruginosa, Escherichia coli, Staphylococcus aureus, Salmonella spp., Candida albicans.
• Preservation (challenge) testing:
  • 1% volume fraction inoculum with the minimum organism suite (S. aureus, E. coli, P. aeruginosa, C. albicans, Aspergillus brasiliensis) and defined sampling intervals.
  • Minimum sampling intervals: 7, 14 and 28 days; minimum sample size: 10 g.
  • Evaluation criteria: Category A (infant/eye/face paints) requires faster and greater log reductions (e.g., ≥3 log reduction for bacteria at 7 days) than Category B (other products).
• Test methods & procedures: Referenced ISO microbiological methods (e.g., ISO 11930, ISO 21148, ISO 6222, ISO 16212 and other cosmetic/ water microbiology standards).

Practical applications and users

• Toy manufacturers and formulators: to design, validate and document microbiological safety and preservative effectiveness for aqueous toys and cosmetic-like toys.
• Quality assurance / QC labs: to perform compliance testing, sample plans and challenge tests per ISO methods.
• Regulatory and conformity assessors: to evaluate product safety dossiers and market surveillance.
• Contract testing laboratories and safety consultants: for test method execution and interpretation.

Related standards

• ISO 8124 series (toy safety suite)
• ISO 11930, ISO 21148 (cosmetics/toy microbiology procedures)
• ISO 18787 (water activity)
• ISO 29621 (risk assessment for low‑risk products)
• ASTM F963 (reference influence noted in the introduction)

ISO 8124-12 is essential for ensuring safe, preservative-effective aqueous toys and cosmetic-type play products and for reducing microbiological hazards in consumer markets.