GB/T 26370-2020 in English

1. Ingredient control indicators

Brominated chloro-5,5-dimethylhydantoin disinfectant must meet the following requirements: effective halogen (as Cl) ≥ 56.0%, bromine mass fraction 31.0%~35.0%, chlorine mass fraction 13.0%~17.0%. 1,3-Dibromo-5,5-dimethylhydantoin disinfectant requires effective bromine (as Br) ≥ 108%, and drying loss ≤ 0.5%.

2. Microbial killing efficiency

The killing logarithm of Bacillus subtilis var. niger in suspension method test should be ≥5.00, and the killing logarithm of natural bacteria in field test should be ≥1.00. The killing logarithm of all indicator bacteria in simulated field test should be ≥3.00.

1. Water body disinfection operation

bromine chlorine hydrazine disinfectant is recommended for swimming pool water treatment, and the effective halogen concentration should be maintained at 2~5mg/L, and the contact time should be guaranteed for 30 minutes after addition.

2. Key points for disinfection of epidemic sources

1000~2000mg/L effective bromine solution should be used for surface disinfection of objects, and the action time should be ≥30 minutes. For sewage disinfection, add 10~20mg/L of effective bromine, and the contact time should be ≥90 minutes.

3. Stability control

The product should be stored away from light and moisture, and the ambient temperature should be ≤30℃. The effective bromine/halogen decline rate should be tested every quarter, and it will be considered invalid if it exceeds 10%.