Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Direct Blue 94 is found to have inherent, primary biodegradability.

Additional information

Direct Blue 94 (C.I.# FAT 11127) is designed to be used as a dye for diverse textile fabrics. To ensure high performance and quality of the treated fabric, these classes of chemical substances are designed to be not biodegradable by microorganisms. Nevertheless, Direct Blue 094 was tested for the biological oxygen demand (BOD5) and chemical oxygen demand (COD) and inherent biodegradbility. The BOD5/COD ratios were equal to zero, indicating that no ready biodegradation can be expected. However, 32.9 % bioelimination was observed in a Zahn-Wellen's test, indicating the chemical to have inherent, primary biodegradability.