I removed "storage" from your list.
Halotron looks the least scary, if injected intravenously

See SDS for the other common extinguishers, they look as bad if not worse.
I rarely use SDS because you don't know quantities, concentrations or context. They list things that COULD happen in the worst case.
You could die if you drink too much milk.
Quote:
Originally Posted by panjumbie
Quoting from the SDS:Precautionary Statements:
P261: Avoid breathing vapors/spray
P271: Use only outdoors or in a well-ventilated area
P304+P340: IF INHALED: Remove person to fresh air and keep comfortable for breathing
P 312 Call a POISON CENTER or doctor/physician if you feel unwell
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Here is the SDS for CO2
Prevention
P251 261 271 280
Do not pierce or burn, even after use.
Avoid breathing gas.
Use only outdoors or in a well-ventilated area.
Wear protective gloves/protective clothing/eye protection/face protection.
Response
P312 321 336 304+340 305+310 313+333
Call a POISON CENTER/doctor if you feel unwell.
Specific treatment (see Section 4. First Aid Measures)
Thaw frosted parts with lukewarm water. Do not rub affected areas.
IF INHALED: Remove person to fresh air and keep comfortable for breathing. IF IN EYES: Immediately call a doctor.
May be harmful in contact with skin or if inhaled.
Here is SD for Dry Power
Prevention
Response
P251 261 264 280
Do not pierce or burn, even after use.
Avoid breathing dust/fumes/gas/mist/vapours/spray.
Wash exposed skin thoroughly after handling.
P312 321
362 302+352 304+340 305+351+338
332+313 342+311 337+313
Wear protective gloves/protective clothing/eye protection/face protection.
Call a doctor if you feel unwell.
Specific treatment (see Section 4. First Aid Measures)
Take off contaminated clothing.
IF ON SKIN: Wash with plenty of water.
IF INHALED: Remove person to fresh air and keep comfortable for breathing.
IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if
present and easy to do – continue rinsing.
If skin irritation occurs: Get medical advice/attention.
If experiencing respiratory symptoms: Call a doctor.
If eye irritation persists get medical advice/attention.