Agent Name

Selenium dioxide

CAS Number

7446-08-4

Formula

O2-Se

Major Category

Other Classes

Synonyms

Selenious anhydride; Selenium dioxide; Selenium dioxide dimer; Selenium oxide; Selenium oxide (1:2); Selenium oxide (Se2O4); Selenium oxide (SeO2); Selenium(IV) dioxide (1:2); Selenous acid anhydride; [ChemIDplus]

Category

Other Inorganic Compounds

Description

White or yellowish-white to slightly reddish, lustrous, crystalline powder or needles. [HSDB]

Sources/Uses

Used to make other selenium compounds; Also used as a reagent and oxidizing agent; [Merck Index #8434] Used as a red colorant in glass and a toner in photographic development; [Wikipedia]

Comments

Reacts with water to produce selenious acid; Can cause severe burns and irritation of the eyes and respiratory tract; Absorbed through the skin; [Olson, p. 670] A corrosive substance that can induce pulmonary edema; Has potential to cause skin sensitization and liver injury; [ICSC] See "Selenium."

Exposure Assessment
TLV (ACGIH)

0.2 mg/m3, as Se

PEL (OSHA)

0.2 mg/m3, as Se

MAK

0.02 mg/m3, as Se, inhalable fraction

IDLH (NIOSH)

1 mg/m3, as Se

Explanatory Notes

VP 12.5 mm Hg @ 70 deg C; mp = 340 deg C; [Merck Index #8434]

Adverse Effects
Skin Sensitizer

Yes

Toxic Pneumonitis

Yes

Neurotoxin

Other CNS Neurotoxin

Hepatotoxin

Hepatotoxin, Secondary

Reproductive Toxin

Yes

Dermatotoxin

Skin Burns

Links to Other NLM Databases
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Chemical Information

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