Chemical Exposure Monitoring

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Laboratory users may use various potentially hazardous materials on a daily basis. Proper laboratory health and safety measures and engineering controls should be applied for the sake of safe use of such materials. In some cases verification of the effectiveness of work practices and engineering controls in limiting hazardous chemicals exposure is required.

Exposure monitoring is the determination of the airborne concentration of a hazardous material in the work environment. Exposure monitoring data is compared to existing international standards exposure guidelines and is often used to make recommendations concerning engineering controls, work practices, and PPE.

Occupational exposure limits for several chemicals that have been determined by Turkish Government is shown in Table 8.1. For further information please see the Regulations on Health and Safety Measures for Working with Chemicals (References, 8.19).

Table 8.1 Occupational exposure limits for several chemicals have been determined by Turkish Government

EINECS

CAS

Sample name

Limiting values

Sign (3)

TWA (4) (8 hours)

STEL (5)(15 min.)

mg/m3 (6)

ppm (7)

mg/m3

ppm

200-467-2

60-29-7

Diethylether

308

100

616

200

-

200-662-2

67-64-1

Acetone

1210

500

-

-

-

200-663-8

67-66-3

Chloroform

10

2

-

-

Skin

200-756-3

71-55-6

1,1,1-Trichloroethane

555

100

1110

200

-

200-834-7

75-04-7

Ethylamine

9,4

5

-

-

-

200-863-5

75-34-3

1,1-Dichloroethane

412

100

-

-

Skin

200-870-3

75-44-5

Phosgene

0,08

0,02

0,4

0,1

-

200-871-9

75-45-6

Chlorodifluoromethane

3600

1000

-

-

-

201-159-0

78-93-3

Butanone

600

200

900

300

-

201-176-3

79-09-4

Propionic acid

31

10

62

20

-

202-422-2

95-47-6

o-Xylene

221

50

442

100

Skin

202-425-9

95-50-1

1,2-Dichlorobenzene

122

20

306

50

Skin

202-436-9

95-63-6

1,2,4-Trimethylbenzene

100

20

-

-

-

202-704-5

98-82-8

Cumene

100

20

250

50

Skin

202-705-0

98-83-9

2-Phenylpropene

246

50

492

100

-

202-849-4

100-41-4

Ethylbenzene

442

100

884

200

Skin

203-313-2

105-60-2

e-Kaprolactam (dust or its vapor)

10

-

40

-

-

203-388-1

106-35-4

Heptan-3-one

95

20

-

-

-

203-396-5

106-42-3

p-Xylene

221

50

442

100

Skin

203-400-5

106-46-7

1,4-Dichlorobenzene

122

20

306

50

-

203-470-7

107-18-6

Allyl alcohol

4,8

2

12,1

5

Skin

203-473-3

107-21-1

Ethylene glycol

52

20

104

40

Skin

203-539-1

107-98-2

1-Methoxypropanol-2

375

100

568

150

Skin

203-550-1

108-10-1

4-Methylpentane-2-on

83

20

208

50

-

203-576-3

108-38-3

m-Xylene

221

50

442

100

Skin

203-603-9

108-65-6

2-Methoxy-1-methylethylacetate

275

50

550

100

Skin

203-604-4

108-67-8

Mesitylene (Trimethylbenzenes)

100

20

-

-

-

203-631-1

108-94-1

Cyclohexanone

40,8

10

81,6

20

Skin

203-632-7

108-95-2

Phenol

7,8

2

-

-

Skin

203-726-8

109-99-9

Tetrahydrofurane

150

50

300

100

Skin

203-737-8

110-12-3

5-Methylhexan-2-one

95

20

-

-

-

203-767-1

110-43-0

Heptan-2-one

238

50

475

100

Skin

203-808-3

110-85-0

Piperazine

0,1

-

0,3

-

-

203-905-0

111-76-2

2-Butoxyethanol

98

20

246

50

Skin

203-933-3

112-07-2

2-Butoxyethyl acetate

133

20

333

50

Skin

204-065-8

115-10-6

Dimethylether

1920

1000

-

-

-

204-428-0

120-82-1

1,2,4-Trichlorobenzene

15,1

2

37,8

5

Skin

204-469-4

121-44-8

Triethylamine

8,4

2

12,6

3

Skin

204-662-3

123-92-2

Isopentylacetate

270

50

540

100

-

204-697-4

124-40-3

Dimethylamine

3,8

2

9,4

5

-

204-826-4

127-19-5

N,N-Dimethylacetamide

36

10

72

20

Skin

205-480-7

141-32-2

n-Butylacrylate

11

2

53

10

-

205-563-8

142-82-5

n-Heptane

2085

500

-

-

-

208-394-8

526-73-8

1,2,3-Trimethylbenzene

100

20

-

-

-

208-793-7

541-85-5

5-Methylheptan-3-one

53

10

107

20

-

210-946-8

626-38-0

1-Methylbutylacetate

270

50

540

100

-

211-047-3

628-63-7

Pentylacetate

270

50

540

100

-

 

620-11-1

3-Pentylacetate

270

50

540

100

-

 

625-16-1

Amylacetate, tert

270

50

540

100

-

215-535-7

1330-20-7

Xylene, (mixture isomers, pure)

221

50

442

100

Skin

222-995-2

3689-24-5

Sulfotep

0,1

-

-

-

Skin

231-634-8

7664-39-3

Hydrogen fluoride

1,5

1,8

2,5

3

-

231-131-3

7440-22-4

Silver (Metallic)

0,1

-

-

-

-

231-595-7

7647-01-0

Hydrogen chloride

8

5

15

10

-

231-633-2

7664-38-2

Orthophosphoric acid

1

-

2

-

-

231-635-3

7664-41-7

Ammonia (anhydrous)

14

20

36

50

-

231-954-8

7782-41-4

Fluoride

1,58

1

3,16

2

-

231-978-9

7783-07-5

Dihydrogen selenide

0,07

0,02

0,17

0,05

-

233-113-0

10035-10-6

Hydrogen bromide

-

-

6,7

2

-

247-852-1

26628-22-8

Sodium azide

0,1

-

0,3

-

Skin

252-104-2

34590-94-8

(2-Methoxymethyletoxy)-propanol

308

50

-

-

Skin

   

Fluorides, inorganic

2,5

-

-

-

-

( 1 ) EINECS: European inventory of chemicals.

( 4 ) TWA: Weighted average that was measured or calculated in 8 hours reference

( 2 ) CAS: Chemical abstracts service number.

( 5 ) STEL: Unless stated otherwise, exposure maximum that should not be exceeded in 15 minutes interval.

( 3 ) Skin: “indicates that the chemical can be significantly absorbed by skin

( 6 ) mg/m3: Amount of substance in milligrams present in 1 m3 of air at 760 mmHg (101,3 KPa in 20 0C).

( 7 ) ppm: Amount of substance in milliliters present in 1 m3 of air (ml/m3).

*Adopted from Turkish Ministry of Labour and Social Security, Regulations on Occupational Health and Safety Measures of Working with Chemicals (Reference 8,19).

Undefined

References and sources for information from the relevant websites and documentation of different universities, NGOs and government agencies used in the preparation of this website are provided at references.

Chemical Safety