Page 8 of 11

Protimeter Speedy

March 2014

7.1 Handling

Keep tightly closed in a dry and cool place. Handle and open container with care.

Use spark proof tools.

Protect against humid air and water.

Keep away from sources of ignition.

No smoking.

7.2 Storage

Calcium carbide must be stored in tightly closed containers in a dry, well ventilated place without sprinkler protection.

Exclude possible sources of ignition of acetylene gas.

Even traces of humidity will cause liberation of explosive acetylene gas.

It should be stored separately from silver, mercury, copper and copper alloys.

8.

Exposure Controls/Personal Protection

The working operation should be arranged in such a way that formation of dust is reduced to a minimum. Avoid moisture.

Provide good ventilation.

Respiratory protection:

For working operations involving dust formation, use approved dust mask (P2). In case of

possible presence of phosphine-, (arsine-) and hydrogen sulphide gas: use combination filter or

preferably fresh air mask until control measurements are done.

Hand Protection:

Rubber gloves

Eye protection:

Safety goggles, eye flushing facilities

Occupational

Exposure

Standards

Long-term Exposure

(8 hour TWA reference period)

Short-term Exposure Limit

(15 minute reference period)

UK

USA

Germ.

Calcium carbide

Not stated

Simple asphyxiant

0,3 (0,4)

0,3 (0,42)

0,1 (0,15)

1 (1)

1 (1,4)

- (-)

0,05 (0,2)

0,05 (0,16)

0,05 (0,2)

- (-)

- (-)

- (-)

10 (14)

10 (14)

10 (15)

15 (21)

15 (21)

- (-)

25 (18)

25 (17)

50 (35)

35 (27)

35 (24)

- (-)

1

Environmental Health Series No. 40 (EH 40), The Health and Safety Executive. Occupational Exposure Limits 1984.

2

Threshold Limit Values 1992 - 1993, American Conference of Governmental Industrial Hygienists (ACGIH).

3

List of MAK- and BAT-values. Commission for the investigation of health hazards of chemical components in the work area.

Report No. 29. Deutsche Forschungsgemeinschaft. 1993.