Potassium cyanide (as CN) |
Synonyms & Trade Names Potassium salt of hydrocyanic acid |
CAS No. 151-50-8 |
RTECS No. TS8750000 |
DOT ID & Guide 1680 157 (solid)
3413 157 (solution) |
FormulaKCN |
Conversion |
IDLH 25 mg/m3 (as CN)
See: cyanides |
Exposure Limits NIOSH REL*: C 5 mg/m3 (4.7 ppm) [10-minute] [*Note: The REL also applies to other cyanides (as CN) except Hydrogen cyanide.]
OSHA PEL*: TWA 5 mg/m3 [*Note: The PEL also applies to other cyanides (as CN) except Hydrogen cyanide.] |
Measurement Methods
NIOSH 6010 , 7904
See: NMAM or OSHA Methods |
Physical Description White, granular or crystalline solid with a faint, almond-like odor. |
MW: 65.1 |
BP: 2957°F |
MLT: 1173°F |
Sol(77°F): 72% |
VP: 0 mmHg (approx) |
IP: NA |
Sp.Gr: 1.55 |
Fl.P: NA |
UEL: NA |
LEL: NA |
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| Noncombustible Solid, but contact with acids releases highly flammable hydrogen cyanide. |
Incompatibilities & Reactivities Strong oxidizers (such as acids, acid salts, chlorates & nitrates) [Note: Absorbs moisture from the air forming a syrup.] |
Exposure Routes inhalation, skin absorption, ingestion, skin and/or eye contact |
Symptoms irritation eyes, skin, upper respiratory system; asphyxia; lassitude (weakness, exhaustion), headache, confusion; nausea, vomiting; increased resp rate, slow gasping respiration; thyroid, blood changes |
Target Organs Eyes, skin, respiratory system, cardiovascular system, central nervous system, thyroid, blood |
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Personal Protection/Sanitation (See protection codes)
Skin: Prevent skin contact
Eyes: Prevent eye contact
Wash skin: When contaminated
Remove: When wet or contaminated
Change: Daily
Provide: Eyewash, Quick drench |
First Aid (See procedures)
Eye: Irrigate immediately
Skin: Soap wash immediately
Breathing: Respiratory support
Swallow: Medical attention immediately |
Respirator Recommendations NIOSH/OSHA Up to 25 mg/m3:
(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 and having an N100, R100, or P100 filter.
Click here for information on selection of N, R, or P filters.
Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection |
| See also: INTRODUCTION See ICSC CARD: 0671
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