Agent Name

Zircon

CAS Number

14940-68-2

Formula

O4-Si.Zr

Major Category

Mineral Dusts

Synonyms

A-PAX 45M; Hyacinth; Silicic acid, zirconium(4+) salt (1:1); Standard SF 200; Ultrox 500W; Zirconite; Zircosil 15; Zirconium(IV) silicate (1:1); [ChemIDplus] Sabbia di zirconio; Zircon sand; Zirkon sand; Zirkonium sand; [IUCLID] Zirconium Silicate; 200, 325, 400, 600 Zircon Flour; Z-Std.; Z-Course; Premium Zircon Sand; Spectralux 1500,3500, 4500, 5500, 6000, 7000; [Continental Mineral Processing MSDS]

Category

Other Mineral Dusts

Description

Colorless to greyish-white to red to brown fine powder; Odorless; [Continental Mineral Processing MSDS]

Sources/Uses

Naturally occurring zirconium silicate found in many different rocks and beach sand from South Carolina and Northeast Florida; [Merck Index] Used as a source of zirconium oxide, metallic zirconium, and hafnium, in abrasives, refractories, enamels, refractory porcelain, silicon rubbers, foundry cores, and as a catalyst; [Continental Mineral Processing MSDS]

Comments

Contains small amounts of uranium and thorium; Causes moderate skin and eye irritation by abrasive action; [IUCLID] Contains 0.1-2% aluminum oxide and aluminum silicate and trace amounts of crystalline silica, titanium dioxide, uranium, and thorium; Abrasive action may cause skin and eye irritation; Non-toxic by ingestion; [Continental Mineral Processing MSDS] See "Zirconium silicate." See "Zirconium."

Reference Link

The Experimental Production of Radiographic Shadows by the Inhalation of Industrial Dusts. Part II: Zircon (ZrSiO4)

Exposure Assessment
TLV (ACGIH)

5 mg/m3, as Zr

STEL (ACGIH)

10 mg/m3, as Zr

PEL (OSHA)

5 mg/m3, as Zr (compounds)

MAK

1 mg/m3, inhalable fraction (metal and insol. cmpds.)

IDLH (NIOSH)

25 mg/m3, as Zr

Links to Other NLM Databases
Toxicity Information

Search TOXNET

Chemical Information

Search ChemIDplus

Related Information in HazMap
Processes

Industrial Processes with risk of exposure: