1842-05-3 Usage
General Description
1,1-Dichloro-1,2-difluoroethane, also known as "Freon 132a" or "R-132a", is a chlorofluorocarbon (CFC) compound used extensively in the 20th century for its refrigerant properties. The compound is a volatile liquid at room temperate that boils readily into a colorless, non-flammable gas. It was extensively used as a refrigerant and for the manufacture of other chemicals. However, due to its high potential to cause ozone depletion, the production and use of this chemical has been greatly limited in recent years under the Montreal Protocol. It's moderately soluble in water and has a slightly sweet, ethereal odor. It is hazardous if inhaled and can cause irritation to skin, eyes, and mucous membranes.
Check Digit Verification of cas no
The CAS Registry Mumber 1842-05-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,4 and 2 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 1842-05:
(6*1)+(5*8)+(4*4)+(3*2)+(2*0)+(1*5)=73
73 % 10 = 3
So 1842-05-3 is a valid CAS Registry Number.
InChI:InChI=1/C2H2Cl2F2/c3-2(4,6)1-5/h1H2
1842-05-3Relevant articles and documents
The chlorination of 1,2-difluoroethane (HFC-152)
Nappa, Mario J.,Sievert, Allen C.
, p. 111 - 118 (1993)
The photochlorination of CH2FCH2F yields CH2FCCl2F and CHClFCHClF, both of which were considered to be potential replacements for CFC-113 (CCl2FCF2Cl) based on their boiling points (48 deg C and 59 deg C, respectively).The CHClFCHClF/CH2FCCl2F ratio can be controlled by the choice of solvents.In aromatic solvents, the reactivity of the chlorine radical is reduced, increasing the amount of CH2FCCl2F produced.Relative rates in CCl4 and in the presence of water were compared to rates in aromatic solvents.Both CH2FCCl2F and CHClFCHClF failed in early toxicity tests and will thus not be pursued as HCFC replacements for CFC-113.
