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CAS

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2050-31-9

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2050-31-9 Usage

Physical state

Colorless liquid

Odor

Pleasant

Solubility

Insoluble in water

Uses

a. Production of polymers and resins
b. Synthesis of pharmaceuticals and agrochemicals
c. Manufacture of fragrances and flavoring agents

Safety

Flammable liquid, requires careful handling to avoid hazards

Check Digit Verification of cas no

The CAS Registry Mumber 2050-31-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,0,5 and 0 respectively; the second part has 2 digits, 3 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2050-31:
(6*2)+(5*0)+(4*5)+(3*0)+(2*3)+(1*1)=39
39 % 10 = 9
So 2050-31-9 is a valid CAS Registry Number.

2050-31-9Downstream Products

2050-31-9Relevant articles and documents

Regioselective Ring Opening in Substituted Benzocyclopropenes. An Alternative or Complementary Mechanism for Electrophilic Substitution Involving Attack at a ? Bond

Bee, Lim Keow,Garratt, Peter J.,Mansuri, Muzamil M.

, p. 7076 - 7079 (2007/10/02)

2-Methylbenzocyclopropene (5) reacts with bromine, iodine, and HCl to give the m-xylenes 12a,c,d as the major products, whereas it reacts with silver nitrate in the presence of ethanol and aniline to give the o-xylenes 11e,f as the major products.Similarly, 3-methylbenzocyclopropene (10) gives mainly m-xylenes 14a,c,d with halogens and HCl and gives p-xylenes 13e,f with silver nitrate and ethanol or aniline.Cyclopropabenzocyclobutene (15) also gives different products with halogens and silver nitrate, but in this case HCl gives the same type of product as the silver ion.The difference in electrophilic behavior of 5, 10, and 15 toward the two types of reagents is suggested to arise from attack of the silver ion (and the proton in the case of 15) on the ? electrons of the cyclopropyl ring.

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