1683-81-4 Usage
Physical state
Colorless, odorless gas
Uses
Refrigerant, foam blowing agent
Classification
Hydrofluorocarbon (HFC)
Environmental impact
Low environmental impact, considered a safe and effective alternative to traditional refrigerants (CFCs and HCFCs)
Toxicity
Low toxicity
Flammability
Non-flammable
Greenhouse gas
Potent greenhouse gas, contributes to global warming
Ongoing efforts
Searching for more environmentally friendly alternatives for use in refrigeration and foam production
Check Digit Verification of cas no
The CAS Registry Mumber 1683-81-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,6,8 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1683-81:
(6*1)+(5*6)+(4*8)+(3*3)+(2*8)+(1*1)=94
94 % 10 = 4
So 1683-81-4 is a valid CAS Registry Number.
1683-81-4Relevant articles and documents
Polyfluorinated carbocations stabilized by oxygen and sulfur
Petrov, Viacheslav A.,Davidson, Fred
, p. 5 - 14 (2007/10/03)
Polyfluorinated oxonium cations RfCH2OCFX(+) and acyclic perfluorinated sulfonium cations RfSCF2(+) are prepared by the reaction of corresponding ethers or sulfides with antimony pentafluoride in SO2ClF solvent and characterized by 19F and 1H spectroscopy. Based on experimental data the relative stability of polyfluorinated oxonium cations are determined.
