What is IDLH limit?

IDLH value: A maximum (airborne concentration) level above which only a highly reliable breathing apparatus providing maximum worker protection is permitted [NIOSH 2004, 2013]. IDLH values are based on a 30-minute exposure duration.

Is cobalt a hazardous material?

* Cobalt is on the Hazardous Substance List because it is regulated by OSHA and cited by ACGIH, DOT, NIOSH, DEP, IARC and EPA. * This chemical is on the Special Health Hazard Substance List because it is a CARCINOGEN and is FLAMMABLE.

What is the IDLH for CO?

1,200 ppm
A 30-minute exposure to 1,200 ppm will produce a COHb of 10-13% [NIOSH 1972]. Basis for revised IDLH: The revised IDLH for carbon monoxide is 1,200 ppm based on acute inhalation toxicity data in humans [Henderson et al.

Is cobalt odorless?

Odorless, silver-gray to black solid.

What is IDLH of h2s?

Basis for revised IDLH: The revised IDLH for hydrogen sulfide is 100 ppm based on acute inhalation toxicity data in humans [Henderson and Haggard 1943; Poda 1966; Yant 1930] and animals [Back et al.

How is IDLH measured?

How are IDLH values chosen? As of their most recent revision in 1994, more than 380 substances currently have IDLH values. NIOSH calculates the values using the LD50 or LC50, which are the measures for the doses or concentrations that it would take to kill half the members of a tested population.

Where is cobalt toxic from?

There are three basic ways that cobalt can cause poisoning. You can swallow it, breathe it into your lungs, or have it come in constant contact with your skin. Cobalt poisoning can also occur from the wear and tear of some cobalt/chromium metal-on-metal hip implants.

Is all cobalt radioactive?

Cobalt-60 is a commercially important radioisotope, used as a radioactive tracer and for the production of high-energy gamma rays. Cobalt is the active center of a group of coenzymes called cobalamins….

Cobalt
Standard atomic weight Ar, std(Co)	58.933194(3)
Cobalt in the periodic table

What carboxyhemoglobin level is lethal?

Generally, levels greater than 50% are lethal, and in patients with underlying ischemic cardiomyopathy, toxicity can be lethal at levels of 10% to 30%.

Does cobalt smell like oranges?

Looks Like: Cobalt is a hard, gray metal that looks much like iron and nickel. 2. Smell Like: In its pure form it smells like oranges.

Does cobalt react with water?

Cobalt is somewhat of a reactive element. It combines with oxygen in the air, but does not catch on fire and burn unless it is in powder form. Cobalt has the ability to react with most acids to produce hydrogen gas. However cobalt does not react with water that is at room temperature.

What is the IDLH of so2?

SO₂ Conversion. 1 ppm = 2.62 mg/m3. IDLH. 100 ppm.

What is the IDLH for cobalt metal fume and dust?

Because no data on acute inhalation toxicity are available on which to base an IDLH for cobalt metal fume and dust, the chosen IDLH is based on the statement by Patty [1963] that animals chronically exposed to a cobalt-metal blend at a concentration of 20 mg Co/m 3 developed lesions in the lungs.

How much cobalt is in your drinking water?

(1) A study found average cobalt levels in drinking water of 2 micrograms per liter (µg/L), but values up to 107 µg/L have been reported. (1) The average daily intake of cobalt from food is estimated to be 5 to 40  µg/d. (1) Occupational exposure to cobalt may occur, particularly in workers in the hard metal industry.

How much cobalt is in the air?

Cobalt is a natural element found throughout the environment; the general population may be exposed to cobalt in the air, drinking water, and food. (1,5) The average concentration of cobalt in ambient air in the United States is approximately 0.0004 micrograms per cubic meter (µg/m. 3. ).

What is the IDLH value of acetaldehyde?

IDLH Values Substance CAS no. IDLH Value (1994) * Acetaldehyde 75-07-0 2,000 ppm Acetic acid 64-19-7 50 ppm Acetic anhydride 108-24-7 200 ppm Acetone 67-64-1 2,500 ppm