Physical properties of each chemical including the physical state (gas, liquid,

ID: 2078601 • Letter: P

Question

Physical properties of each chemical including the physical state (gas, liquid, solid) at room temperature (25 degrees C = 78 degrees F) At least two processes where the chemical is used in industry. The OSHA PEL for each chemical (If the PEL is given in ppm enter the units in gpm) The method used by OSHA for collecting an air sample to determine an employee exposure for each chemical. Make sure you include a description of the collecting medium the recommended flowrate or range of flowrates, and the recommended minimum and/or maximum sample volume or sampling time. The analytical method used to analyze the sample including the limit of detection (Include an OSHA reference number for the method). You must include the units for the limit of detection. Chemicals Acrolein (107-02-8), n-hexane (110-54-3), cobalt (7440-48-4), elemental mercury (7439-97-5), methyl ethyl ketone (78-93-3), sulfuric acid mist (7664-93-9), trinitrotoluene (118-96-7), toluene diisocyanate (26471-62-5), perchoroethylene(127-18-4), triethylamine 21-44-8), vinyl chloride (75-01-4) and carbon monoxide(630-08-0). Helpful websites: http: //www.skcinc.com/osha-niosh/default.asp https: //www.osha.gov/dts/sltc/methods/toc.html https: //www.osha.gov/dts/chemicalsampling/toc/chmn_Ahtml Chemical: methyl ethyl ketone (78-93-3)

Explanation / Answer

The points are given below:

It is colorless or pale liquid at room temperature which is usually soulble in water. Chemically founded as monomer and dimer.The monomer comes with the molecular weight of 122unit while the dimer weighs 210units (approx). Monomer is soluble in water, alcohol and ether while dimer is soluble in hexen and water

Indurtrial usage:

1. Cut stone and stone products

2. As boat reparing materials

Sampling method: Evaluation method using the limit defining parameters like reliable and detection limits etc. The tubes are packed with 80mg front and 40 mg back sections and the method is valid without any sampling reagent

Colection medium:XAD-4 absorbent tubes, using sampling pump with required calibration of recommended flow rate

Flow rate: max rate is 1.0L/min

Recommended sample volume: 15L considering the flow rate

Analytical method: Uses high prformance liquid cromatography with some standard reagents like IPA, acetic acid, sodium iodide ; used flow rate 1ml/min

Limit of detection: 292-360nm depending on the injected volume

Physical properties Proceses OSHA PEL