SKC Gulf Coast's comprehensive online product catalog and support literature

For your convenience, SKC manufactures coated filters for a wide variety of air sampling methods that require chemically-treated filters or pads. SKC Coated Filters are shipped inside the cassettes with end plugs and sealing bands in place. No assembly is required; they are ready to use.

To use coated filters, simply remove the end caps and connect the cassette to the sampling pump using Tygon ^® tubing. Remove the inlet section if sampling open face. After sampling, remove the cassette and replace the end caps or entire inlet section. Record the flow rate and sample time, then send the filter cassettes and sampling information to a lab for analysis.

Coated Filter Selection Chart
Chemical	Analytical Method	Filter and Coating Coated filters have a limited shelf life	Cassette with sealing bands	Cat. No.	Qty
Acetic anhydride	OSHA 82	Glass-filters;-1-(2-pyridyl)-piperazine	4-piece, 37 mm	225-9009 •	10
Acetic anhydride	OSHA 102	Glass filters; veratrylamine and di-n-octyl phthalate	4-piece, 37 mm	225-9010†	10
4-Aminobiphenyl	OSHA 93	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Aniline	NIOSH 2017 ¥	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004¥	10
Arsenic volatile compounds	OSHA ID 105	MCE filter & cellulose pad; sodium carbonate	3-piece, 37 mm	225-9001	10
Benzidine	OSHA 65	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Bromine	NIOSH 6011	Teflon ^® pre-filter & porous plastic support; specially-cleaned silver membrane & porous plastic support	3-piece, 25 mm	225-9006	5
Chlorine	NIOSH 6011	Teflon pre-filter & porous plastic support; specially-cleaned silver membrane & porous plastic support	3-piece, 25 mm	225-9006	5
Crotonaldehyde	OSHA 81	2 Glass filters; 2,4-dinitrophenylhydrazine and phosphoric acid	3-piece, 37 mm	225-9019 •	10
o-Dianisidine	OSHA 71	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
3,3'-Dichlorobenzidine	OSHA 65	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Diisocyanates — 1,6-Hexamethylene diisocyanate (HDI), Toluene-2,4-diisocyanate (2,4-TDI ), Toluene-2,6-diisocyanate (2,6-TDI)	OSHA 42 ‡	Glass filter & cellulose support; 1-(2-pyridyl) piperazine‡	3-piece, 37mm	225-9002 ‡• or 225-9013‡•	10
Diisocyanates — Toluene-2,4-diisocyanate (2,4-TDI ), Toluene-2,6-diisocyanate (2,6-TDI)	ASTM D5836 ‡	Glass filter & cellulose support; 1-(2-pyridyl) piperazine‡	3-piece, 37mm	225-9002 ‡• or 225-9013‡•	10
Diisocyanates (NDI, etc)	MDHS 25/3 (UK)	AE Glass filters; methoxyphenyl piperazine	25 mm filters only, not in preloaded cassettes	225-9011•	5
Diphenylamine	OSHA 78	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Fluorides	OSHA ID 110 NIOSH 7902 NIOSH 7906 ASTM D4765	MCE filter & cellulose pad; sodium carbonate	3-piece, 37 mm	225-9001 *	10
Fluoride, particulates	EPA 14A not EPA TO-14A	2 PVC filters & supports; sodium formate/ Metricel^® filter; uncoated	4-piece, 37 mm	225-9016	10
Glutaraldehyde	OSHA 64	Glass filters; 2,4-dinitrophenyl hydrazine	4-piece, 37 mm	225-9003•	10
Hydrazine	OSHA 108	Glass filters; sulfuric acid	3-piece, 37 mm	225-9012	10
N-Isopropylaniline	OSHA 78	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Maleic Anhydride	OSHA 86	Glass filters; veratrylamine	3-piece, 37 mm	225-9021	10
Mercaptans (methyl-, ethyl- and n-butyl-)	NIOSH 2542	Glass filter; mercuric acetate	2-piece, 37 mm	225-9007	10
4,4'-Methylene bis (2-chloroaniline) (MOCA)	OSHA 71	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Methylene bisphenyl isocyanate (MDI)	OSHA 47 ‡	Glass filter & cellulose support; 1-(2-Pyridyl) piperazine‡	3-piece, 37mm	225-9002 ‡• or 225-9013 ‡•	10
4,4'-Methylenedianiline	OSHA 57	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
1-Naphthylamine	OSHA 93	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
2-Naphthylamine	OSHA 93	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Nitrobenzene	NIOSH 2017 ¥	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004¥	10
Ozone	OSHA ID 214	2 Glass filters; nitrite-impregnated	3-piece, 37 mm	225-9014†	10
N-Phenyl 1-Naphthalymine	OSHA 96	Extra thick glass filters; ascorbic acid	3-piece, 25 mm	225-9015	5
N-Phenyl 2-Naphthalymine	OSHA 96	Extra thick glass filters; ascorbic acid	3-piece, 25 mm	225-9015	5
Phenylene diamine (o-, m-, p-)	OSHA 87	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Phosphine	OSHA 1003	Glass filter; untreated Polyester filter; mercuric chloride	3-piece, 37 mm	225-9018†	10
Sulfur dioxide	NIOSH 6004 #	MCE pre-filter & support/cellulose filter & support; sodium carbonate	3-piece, 37 mm #	225-9005	10
2,4-Toluendiamine	OSHA 65	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
2,6-Toluendiamine	OSHA 65	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
o-Toluidine	NIOSH 2017 ¥	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
o-Tolidine	OSHA 71	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Toluidine (o-, m-, p-)	OSHA 73	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10
Valeraldehyde	OSHA 85	3 Glass filters; 2,4-dinitrophenylhydrazine and phosphoric acid	3-piece, 37 mm	225-9020 •	10
m-Xylylenediamine and p-Xylylenediamine (m-XDA, p-XDA)	OSHA 105	Glass filters; sulfuric acid	3-piece, 37 mm	225-9004	10

Table Notes

•	Freezer storage required.
†	Special order due to limited shelf-life.
‡	OSHA Method 42 specifies a filter loading of 0.1 mg of 1-(2-pyridyl) piperazine, and OSHA 47 and ASTM D5836 each specify a filter loading of 1 mg of 1-(2-pyridyl) piperazine; however CF/CST 225-9002 and 225-9013 are acceptable for all of these sampling methods 225-9002: Loading of 1-(2-pyridyl) piperazine increased to 2 mg to increase stability and shelf-life of filters. 225-9013: Loading of 1-(2-pyridyl) piperazine is 1 mg.
#	NIOSH Method 6004 modified. Single 3-piece cassette replaces two 2-piece cassettes in series following 1993 NIOSH revisions. Reference: Lorberau, Charles, "Determination of Gaseous and & Series Particulate Fluorides by Ion Chromatographic Analysis," Applied Occupational and Environmental Hygiene 8 (9) 1993, pp. 775-784.
¥	NIOSH Method 2017 also requires SKC Sorbent Tube Catalog Number 226-15
•	Filters only; not in preloaded cassettes
*	The concept of sampling for fluorides in air using a double filter is patented in Canada by IRSST (Institut de recherche en santé et en sécurité du travail du Québec), 21-April-92, Patent No. 1,299,114.

Custom Filters Available

For specific applications, SKC will manufacture filters to meet your specific requirements. Contact us for more information.