Propyne, mixed with propadiene

(General first aid procedures)；Eye: Frostbite - If eye tissue is frozen, seek medical attention immediately; if tissue is not frozen, immediately and thoroughly flush the eyes with large amounts of water for at least 15 minutes, occasionally lifting the lower and upper eyelids. If irritation, pain, swelling, lacrimation, or photophobia persist, get medical attention as soon as possible.；Skin: Frostbite - Compressed gases may create low temperatures when they expand rapidly. Leaks and uses that allow rapid expansion may cause a frostbite hazard. Wear appropriate personal protective clothing to prevent the skin from becoming frozen.；Breathing: Respiratory support

NIOSH/OSHA；Up to 3400 ppm:；(APF = 10) Any supplied-air respirator；(APF = 50) Any self-contained breathing apparatus with a full facepiece；Emergency or planned entry into unknown concentrations or IDLH conditions:；(APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode；(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus；Escape:；(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern；Any appropriate escape-type, self-contained breathing apparatus；Important additional information about respirator selection

1000.0 [ppm]

1250.0 [ppm]

1000 ppm [1964]

1250 ppm [1964]

1000.0 [ppm]

1000 ppm (1800 mg/m³)

TWA 1000 ppm (1800 mg/m3) See Appendix G

1250 [ppm]

2500 [ppm]

15000 [ppm]

1000 ppm (1800 mg/m³)

1250 ppm (2250 mg/m³)

TWA 1000 ppm (1800 mg/m3) ST 1250 ppm (2250 mg/m3)

3400.0 [ppm]；Excerpts from Documentation for IDLHs: Basis for revised IDLH: Since a methyl acetylene­propadiene mixture appears to have relatively low toxicity, and based on an analogy to methyl acetylene [ACGIH 1991], the revised IDLH is 3,400 ppm based strictly on safety considerations (i.e., being 10% of the lower explosive limit of 3.4%).

3400 ppm

3400 ppm [10%LEL]；See: 59355758

Chemical: Methyl acetylene-propadiene mixture

MAPP: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.