1998-61-4 Usage
General Description
4-Bromotetrafluorophenol is a chemical compound with the formula C6H2BrF4O. It is a white crystalline powder that is primarily used as a synthetic intermediate in the manufacture of pharmaceuticals and agrochemicals. 4-BROMOTETRAFLUOROPHENOL is also utilized as a building block in the synthesis of dyes, pigments, and specialty chemicals. It is considered to be stable under normal temperature and pressure, but can react violently with strong oxidizing agents. Its main hazards include skin and eye irritation, as well as harmful effects if ingested or inhaled. Due to its potential health and environmental risks, proper precautions should be taken when handling 4-Bromotetrafluorophenol.
Check Digit Verification of cas no
The CAS Registry Mumber 1998-61-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,9,9 and 8 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1998-61:
(6*1)+(5*9)+(4*9)+(3*8)+(2*6)+(1*1)=124
124 % 10 = 4
So 1998-61-4 is a valid CAS Registry Number.
InChI:InChI=1/C6HBrF4O/c7-1-2(8)4(10)6(12)5(11)3(1)9/h12H
1998-61-4Relevant articles and documents
P-Hydroxyphenacyl photoremovable protecting groups Robust photochemistry despite substituent diversity
Givens, Richard S.,Stensrud, Kenneth,Conrad, Peter G.,Yousef, Abraham L.,Perera, Chamani,Senadheera, Sanjeewa N.,Heger, Dominik,Wirz, Jakob
scheme or table, p. 364 - 384 (2011/06/22)
A broadly based investigation of the effects of a diverse array of substituents on the photochemical rearrangement of p-hydroxyphenacyl esters has demonstrated that common substituents such as F, MeO, CN, CO2R, CONH2, and CH3 have little effect on the rate and quantum efficiencies for the photo-Favorskii rearrangement and the release of the acid leaving group or on the lifetimes of the reactive triplet state. A decrease in the quantum yields across all substituents was observed for the release and rearrangement when the photolyses were carried out in buffered aqueous media at pHs that exceeded the ground-state pKa of the chromophore where the conjugate base is the predominant form. Otherwise, substituents have only a very modest effect on the photoreaction of these robust chromophores.