The primary purpose of testing Kajal under IS 15154:2002 is to ensure that the product is safe, non-toxic, and suitable for use in the sensitive eye area. Since Kajal is applied close to mucous membranes, its safety profile must be exceptionally stringent. The specific purposes of testing include:

1. Ensure Ocular Safety
   – To verify that Kajal is non-irritating to eyes and skin, especially since it is applied directly on the eyelids or waterline.

2. Detect Heavy Metal Contamination
   – To confirm the absence of toxic elements like lead, mercury, and arsenic, which pose serious health risks, particularly when absorbed through the eye area.

3. Confirm Use of Permitted Colorants
   – To ensure only BIS-approved and safe colorants are used, excluding banned dyes like lead-based black pigments.

4. Check for Microbial Safety
   – To ensure the product is free from harmful bacteria and fungi, such as Staphylococcus aureus and Pseudomonas aeruginosa, which can cause eye infections.

5. Evaluate Physical Quality
   – To check for smoothness, absence of gritty particles, and uniform consistency, preventing abrasion or discomfort during application.

6. Ensure Labeling and Ingredient Compliance
   – To verify that all ingredients are clearly declared and that the product adheres to cosmetic labeling norms under Indian regulations.

7. Assess Product Stability
   – To ensure that Kajal maintains its texture, efficacy, and microbial safety throughout its shelf life.

By meeting the standards of IS 15154:2002, the product can be confidently marketed as safe for regular cosmetic use near the eyes, ensuring both consumer protection and regulatory compliance.