Items | Standard | Result |
Appearance | white to almost white crystalline powder | white crystalline powder |
Solubility | Freely soluble in methanol, soluble in ethanol,Sparingly soluble in dichloromethane and practically insolue in water | conforms |
Indentification IR | The infrared absorption spectrum is concordant with fipronil working standard | conforms |
Loss on drying | Not more than 0,5% | 0.12% |
Sulphated ash | Not more than 0.1% | 0.01% |
Heavy metals | Not more than 10PPm | < 10ppm |
Specific optical rotation[a]D20 | Between -0.2° and +0.2° | 0° |
Related substances(byHPLC) 1)Impurity A
2)impurity B individual impurity Total impurities |
Not more than0.5%
Not morethan0.5% Not more than0.2% Not more than 1.5% |
0.30% 0.13% 0.03% 0.47% |
Assay (by HPLC) | between 98% and 102% calculated to the dried substance | 99.40% |
Residual solvents(by GC) Ethanol | Not more than 5000ppm | 53ppm |
Conclusion | Conforms with the enterprise Standard |