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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


  SRM Description Unit of Issue     Measurand(s)
Detail Certificate MSDS 1648a
Now Selling
Urban Particulate Matter 2 g   Certified: 25 elements, 21 PAHs, 7 PCBs
Reference values: 8 elements, 54 PAHs, 16 nitro-PAHs, 46 PCBs, 34 pesticides
Detail Certificate MSDS 1649b
Now Selling
Urban Dust 2 g   Certified: 3 elements, 23 PAHs, 13 PCBs, 4 pesticides
Reference values: 1 element, 38 PAHs, 16 nitro-PAHs, 49 PCBs, 34 pesticides
Detail Certificate MSDS 1650b
Now Selling
Diesel Particulate Matter 200 mg   Certified: 26 PAHs, 7 nitro-PAHs
Reference values: 59 PAHs, 16 nitro-PAHs
Detail 1866b
Out of Stock
Common Commercial Asbestos set (3)   chrysotile, amosite, crocidolite
Detail Certificate MSDS 1877
Now Selling
Beryllium Oxide Powder 20 g   35.76 % beryllium
Detail Certificate MSDS 1878b
Now Selling
Respirable Alpha Quartz (Quantitative X-Ray Powder Diffraction Standard) 5 g   96.73 % alpha quartz
Detail Certificate MSDS 1879b
Now Selling
Respirable Cristobalite (Quantitative X-Ray Powder Diffraction Standard) 5 g   93.98 % cristobalite
Detail Certificate MSDS 1975
Out of Stock
Diesel Particulate Extract 4 x 1.2 mL   Certified: 8 PAHs, 4 nitro-PAHs
Reference values: 23 PAHs, 15 nitro-PAHs, mutagenicity, residue mass
Detail Certificate MSDS 2583
Now Selling
Trace Elements in Indoor Dust (Nominal Mass Fraction of 90 mg/kg Lead)
8 g   Certified: 5 elements
Detail Certificate MSDS 2584
Now Selling
Trace Elements in Indoor Dust (Nominal Mass Fraction of 1 % Lead)
8 g   Certified: 5 elements
Reference values: 10 elements
Detail Certificate MSDS 2585
Now Selling
Organic Contaminants in House Dust 10 g   Certified: 33 PAHs, 30 PCBs, 4 pesticides, 15 PBDEs
Reference values: 33 PAHs, 12 PCBs, 10 pesticides, 3 PBDEs
5 polycyclic musks, 8 PFAAs
Detail Certificate MSDS 2786
Now Selling
Fine Atmospheric Particulate Matter (Mean Particle Diameter < 4 µm) 100 mg to 140 mg   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
Detail Certificate MSDS 2787
Now Selling
Fine Atmospheric Particulate Matter (Mean Particle Diameter < 10 µm) 100 mg to 140 mg   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
Detail Certificate MSDS 2975
Now Selling
Diesel Particulate Matter 1 g   Certified: 10 PAHs, 7 nitro-PAHs
Reference values: 36 PAHs, 
9 nitro-PAHs, particle-size, total extractable mass