Toxicological Evaluation and Limit Values for Nonylphenol, Nonylphenol Ethoxylates, Tricresyl, Phosphates and Benzoic Acid

8. Limit value in air

For the estimation of a limit value in air, a LOAEL of 25 mg benzoic acid/m³ from the four-week rat study is considered.

               LOAEL         25 mg/m³
LV_air = ----------- = -----------
          SF_I x SF_II x SF_III 10 x 10 x 10

= 0.025 mg/m³

The safety factor SF_I is set to 10 as animal data are used. The SF_II is set to 10 to protect the most sensitive individuals in the population. The SF_III is set to 10 since a LOAEL is used in stead of a NOAEL and because the calculation is based upon a short-term four-week study.