Procedure

Hazardous Chemical

Substitute

Organic synthesis

chromate ion ethyl ether

hypochlorite ion, methyl t-butyl ether

Qualitative test for heavy metals

sulfide ion

hydroxide ion

Molecular weight determination by freezing point lowering methods

benzene

cyclohexane

Temperature

mercury thermometers

red alcohol or spirit fluid thermometers, digital thermometers

Storage of biological specimens

formaldehyde

ethanol or other preservatives, Formalternate (Flinn Scientific), Formalin

In-phase change and freezing point depression

acetamide

stearic acid

Qualitative test for halide ions

carbon tetrachloride

cyclohexane

Measurement of vapor pressure-temperature by isotensiscope

carbon tetrachloride

isopropyl alcohol

When used as a polymer

Benzoyl peroxide

Laurel peroxide catalyst

Chloroform

1,1,1-trichloroethane

Carbon tetrachloride

1,1,1-trichloroethane

Parts-washers or other solvent processers

halogenated solvents

non-halogenated solvents

Sodium dichromate

Sodium hypochlorite

Toluene

simple alcohols and ketones

Xylene

simple alcohols and ketones

Fluorinert

non-volatile, reuseable pressurizing fluid

DNA Preps

Chloroform extractions

Promega Corp Magic Preps (800-356- 9526), Stratagene Lambda DNA Purification Kit (800-424-5444)