Which of the following is/are possible safety hazards encountered in the alcohol

Question

Which of the following is/are possible safety hazards encountered in the alcohol dehydration experiment? (check all that apply)

1. conc. sulfuric and phosphoric acids are very corrosive before the reaction

2.waste conc. sulfuric and phosporic acid are very corrosive and must be disposed of properly

3. bromine is toxic and corrosive; avoid breathing and skin contact

4. 4-methylcyclohexanol is a known carcinogen and must be handled with care

5. 4-methylcyclohexene is a noxious irritant; keep in a closed container, and use a packed CaCl2 to cut down on vapors

6. If containers are not closed properly, joints not properly sealed, or water not run through the reflux condensor, toxic or noxious vapors will escape

Explanation / Answer

Answer options are: 1,2,3,5,6 only

I request you to go through the following 4 pages pdf file and see last page safety.

http://xula.edu/chemistry/documents/orgleclab/22Dehyd.pdf           (4th page)

https://www.utdallas.edu/~scortes/ochem/OChem_Lab1/recit_notes/recit_exp25_alcoh_dehydr.pdf      (5th page)

1. conc. sulfuric and phosphoric acids are very corrosive before the reaction

2.waste conc. sulfuric and phosporic acid are very corrosive and must be disposed of properly

3. bromine is toxic and corrosive; avoid breathing and skin contact

5. 4-methylcyclohexene is a noxious irritant; keep in a closed container, and use a packed CaCl2 to cut down on vapors

6. If containers are not closed properly, joints not properly sealed, or water not run through the reflux condensor, toxic or noxious vapors will escape.

We use bromine in this experiment and also KMnO4 to check whether 4-methylcyclohexene if formed or not (When KMnO4 and Br2 were discolored by the product it indicated that the product contain C=C bonds). We prefer KMnO4 rather than Br2 due to its less toxic and hazard.

Generally benzene and its related aromatic products are carcinogenic, not 4-methylcyclohexanol listed as carcinogenic. See

https://pubchem.ncbi.nlm.nih.gov/compound/4-methylcyclohexanol#section=Safety-and-Hazards

http://nj.gov/health/eoh/rtkweb/documents/fs/1243.pdf     (2nd page Cancer Hazard)

For 4-methylcyclohexene safety hazard information see at

https://pubchem.ncbi.nlm.nih.gov/compound/4-Methyl-1-cyclohexene#section=Hazards-Identification

If your response is incorrect then please check all

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