|
Cov khoom |
Txuj |
|
Qhov tshwm sim |
Lub daj daj los yog yuav luag dawb crystalline hmoov |
|
Assay |
Ntau dua lossis sib npaug li 98.00% |
|
Poob qhuav |
Tsawg dua lossis sib npaug li 0.50% |
|
Sulfate residue |
Tsawg dua lossis sib npaug li 0.20% |
|
Melting point |
231.0~~235.0degree |
Nqe lus piav qhia: 7-Hydroxycoumarin, dawb koob zoo li siv lead ua. Melting point 225-228℃(230-232 degree). Yooj yim soluble hauv cawv, chloroform, thiab acetic acid; soluble nyob rau hauv dilute alkaline daws; sparingly soluble hauv ether; me ntsis soluble nyob rau hauv boiling dej (1g / 100ml). Cov tshuaj qhia pom xiav fluorescence. Nws sublimes.
Daim ntaub ntawv: Siv los ua qhov taw qhia fluorescent thiab kua qaub- ntsuas pH (pH 6.5-8.0).
Cim npe nrov: 7-hydroxycoumarin cas 93-35-6, Tuam Tshoj 7-hydroxycoumarin cas 93-35-6 manufacturers, lwm tus neeg
