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105.12 - Respirable Materials

SRMs 1878b and 1879b are crystalline silica materials with particle size in the respirable range. They are intended for use in determining, by x-ray diffraction, the levels of respirable silica in an industrial atmosphere according to National Institute for Occupational Safety and Health (NIOSH) Analytical Method 7500 or equivalent methods. NOTE:These SRMs are not certified for particle size.

Also see Table 105.10 Respirable Materials on Filter Media

PLEASE NOTE: The tables are presented to facilitate comparisons among a family of materials to help customers select the best SRM for their needs. For specific values and uncertainties, the certificate is the only official source.


- Certified values are normal font
- Reference values are italicized
- Values in parentheses are for information only


Detail - Detail    Certificate - Certificate    Report of Investigation - Report of Investigation    MSDS - MSDS    Data Files - Data Files    Questionaire - Questionnaire


  1648a 1649b 1650b 1866b 1877 1878b 1879b 1975 2583 2584 2585 2786 2787 2975
Status   >> Now Selling Now Selling Now Selling Out of Stock Now Selling Now Selling Now Selling Out of Stock Now Selling Now Selling Now Selling Now Selling Now Selling Now Selling
Description   >> Urban Particulate Matter Urban Dust Diesel Particulate Matter Common Commercial Asbestos Beryllium Oxide Powder Respirable Alpha Quartz (Quantitative X-Ray Powder Diffraction Standard) Respirable Cristobalite (Quantitative X-Ray Powder Diffraction Standard) Diesel Particulate Extract Trace Elements in Indoor Dust (Nominal Mass Fraction of 90 mg/kg Lead)
Trace Elements in Indoor Dust (Nominal Mass Fraction of 1 % Lead)
Organic Contaminants in House Dust Fine Atmospheric Particulate Matter (Mean Particle Diameter < 4 µm) Fine Atmospheric Particulate Matter (Mean Particle Diameter < 10 µm) Diesel Particulate Matter
  Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS Detail Certificate MSDS
Unit of Issue   >> 2 g 2 g 200 mg set (3) 20 g 5 g 5 g 4 x 1.2 mL 8 g 8 g 10 g 100 mg to 140 mg 100 mg to 140 mg 1 g

Measurand(s) Certified: 25 elements, 21 PAHs, 7 PCBs
Reference values: 8 elements, 54 PAHs, 16 nitro-PAHs, 46 PCBs, 34 pesticides
Certified: 3 elements, 23 PAHs, 13 PCBs, 4 pesticides
Reference values: 1 element, 38 PAHs, 16 nitro-PAHs, 49 PCBs, 34 pesticides
Certified: 26 PAHs, 7 nitro-PAHs
Reference values: 59 PAHs, 16 nitro-PAHs
chrysotile, amosite, crocidolite 35.76 % beryllium 96.73 % alpha quartz 93.98 % cristobalite Certified: 8 PAHs, 4 nitro-PAHs
Reference values: 23 PAHs, 15 nitro-PAHs, mutagenicity, residue mass
Certified: 5 elements
Certified: 5 elements
Reference values: 10 elements
Certified: 33 PAHs, 30 PCBs, 4 pesticides, 15 PBDEs
Reference values: 33 PAHs, 12 PCBs, 10 pesticides, 3 PBDEs
5 polycyclic musks, 8 PFAAs
Certified: 25 PAHs, 2 nitro-PAHs, 2 PBDE, 8 elements
Reference values: 27 PAHs, 5 nitro-PAHs, 13 elements, 3 sugars, 5 PBDE, 12 dioxins, 15 furans
Certified: 23 PAHs, 2 nitro-PAHs, 2 PBDE, 7 elements
Reference values: 27 PAHs, 5-nitro-PAHs, 5 PBDE, 14 elements, 3 sugars, 12 dioxins, 15 furans
Certified: 10 PAHs, 7 nitro-PAHs
Reference values: 36 PAHs, 
9 nitro-PAHs, particle-size, total extractable mass