421-99-8 Usage
Physical state
Colorless, nonflammable liquid
Odor
Faint sweet odor
Uses
a. Refrigerant
b. Cleaning solvent
c. Propellant in aerosol products
Environmental impact
Detrimental effects on the ozone layer
Regulatory status
Phased out and banned under the Montreal Protocol
Health hazards
Classified as a potential carcinogen
Environmental hazards
Linked to environmental and health hazards
Current status
Efforts made to find alternative substitutes for various industrial applications
Check Digit Verification of cas no
The CAS Registry Mumber 421-99-8 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 4,2 and 1 respectively; the second part has 2 digits, 9 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 421-99:
(5*4)+(4*2)+(3*1)+(2*9)+(1*9)=58
58 % 10 = 8
So 421-99-8 is a valid CAS Registry Number.
421-99-8Relevant articles and documents
19F nuclear magnetic resonance studies of halogenated propanes
Tanuma, T.,Ohnishi, K.,Okamoto, H.,Miyajima, T.,Morikawa, S.
, p. 259 - 284 (2007/10/02)
The relationship between 19F chemical shifts in halogenated propanes and their structures are elucidated using MNDO calculations to determine the population of rotamers.The pairs of atom gauche to a fluorine atom and van der Waals interaction between the two terminal substituents are responsible for the 19F chemical shifts.The differences among chemical shifts in diastereomers are also discussed in terms of the conformation of molecule.
