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 SILICA, AMORPHOUS: METHOD 7501, Issue 3, dated 15 March 2003 - Page 7 of 8 REFERENCES: [1] [2]

[3]

[4]

[5] [6] [7] [8]

Palassis J [19 82]. N IOS H Interna l Rep ort. Cincinn ati, OH : National Ins titute for O ccu pation al Safety and H ealth, (unpublished, August). NIOSH [1981]. NIOSH /OSH A O ccupatio nal He alth Guidelines for Ch em ical Ha zards. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health. DHHS (NIOSH) Publication No. 81123. Available as GPO Stock #017-033-00337-8 from Superintendent of Documents, W ashington, DC 20402. Key-Schwartz RJ, Baron PA, Bartley DL, Rice FL, Schlecht PC [2003]. Chapter R, Determination of airborne c rystalline silica. In: NIO SH Ma nua l of Analytical Metho ds, 4 th ed., 3 rd Suppl. Cin cinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 2003154. NIOSH [1980]. Amorphous Silica: Method P&CAM 316. In: Taylor DG, ed., NIOSH M anual of Analytical Methods, 2nd ed., Vol. 6. Cincinnati, OH: U.S. Department of Health and Human Services, Public Health Service, Centers for Disease Control, National Institute for Occupational Safety and Health, DHHS (NIOSH) Publication No. 80-125. Lange BA, Haartz JC, Hornung RW [1981]. Determination of synthetic amorphous silica on industrial air samples, Anal Chem 53(9):1479-84. Inhaled Particles and Vapours [1961]. Pergamon Press, Oxford, U.K. Leroux, J, Powers C [1969]. Direct X-ray diffraction quantitative analysis of quartz in industrial dust films de pos ited on silver m em bran e filters, Luft 29(5):26. Palassis, J [1984]. Amorphous silica analysis by X-ray powder diffraction. Paper presented to the Am Ind Hyg Con ference. De troit, MI (May 1984).

METHOD REVISED BY: Rosa Key-Schwartz, Ph.D., NIOSH/DART

T ABL E 1. C AS Nu m be rs, R T EC S N um bers, and Exposure Lim its for Am orphorous Silica Forms Amorphous Forms

CAS#

RTECS

OSHA PEL (mg/m3)

NIOSH PEL (mg/m3)

ACGIH TLV (mg/m3)

diatomaceous earth, <1% crystalline SiO2

61790-53-2

HL8600000

80/% SiO2

6

10 (total)

precipitated, and gel

7699-41-4, 112926-00-8

VV8850000

80/% SiO2

6

10 (total)

fumed

69012-64-2 112945-52-5

VV310000

80/% SiO2

–

2 (respir)

fused

60676-86-0

VV7328000

–

–

0.1 (respir)

NIOSH Manual of Analytical Methods (NMAM), Fourth Edition