The Standard – January 2015 Share

Toxaphene

Toxaphene Congeners

Toxaphene is a technical mixture containing hundreds of polychlorinated camphenes with chlorination levels ranging from Cl₅ to Cl₁₂, although most target congeners range from Cl₆ to Cl₁₀.

First introduced in the US in 1947, toxaphene was primarily used as an insecticide for cotton and soybean crops. The use of toxaphene in the US was restricted in 1982 and banned entirely in 1990, although it is still permitted for use in very defined circumstances in certain US territories. Restrictions and bans in most of the world were harmonized with the ratification of the first Stockholm Convention on Persistent Organic Pollutants¹ (also known as the POPs Treaty) in 2004.

Commercial toxaphene is considerably more complex than commercial PCB mixes such as aroclors and kanechlors. Synthesisand isolation of individual toxaphene congeners is correspondingly difficult, making production of standards for routine analysis more challenging. Although EPA Method 8276 was published in 2010, it has often been difficult to obtain standards for the analytes listed in that method. All eight unlabeled compounds cited in M8276 can now be ordered from CIL, in addition to five others, both ¹³C labeled and unlabeled, not cited in the method. A mixture of the eight target analytes referenced in M8276² (Hx-Sed, Hp-Sed, Parlar 26, Parlar 40, Parlar 41, Parlar 44, Parlar 50, and Parlar 62) is currently in production.

1. http://chm.pops.int/TheConvention/ThePOPs/The12InitialPOPs/tabid/296/Default.aspx
2. http://www.epa.gov/osw/hazard/testmethods/pdfs/8276.pdf

Catalog No.	Description	Concentration	Amount
ULM-9428-1.2*	HX-SED (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-9429-1.2*	HP-SED (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-7828-1.2*	Parlar 26 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-8665-1.2	Parlar 32 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-9005-1.2	Parlar 38 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-8767-1.2	Parlar 39 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-9430-1.2*	Parlar 40 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-9431-1.2*	Parlar 41 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-9432-1.2*	Parlar 44 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-7829-1.2*	Parlar 50 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-7830-1.2*	Parlar 62 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-8768-1.2	Parlar 69 (unlabeled)	10 μg/mL in nonane	1.2 mL
ULM-8769-1.2	Parlar 70 (unlabeled)	10 μg/mL in nonane	1.2 mL
CLM-7930-1.2	Parlar 26 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8705-1.2	Parlar 32 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8719-1.2	Parlar 39 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-7931-1.2	Parlar 50 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-7932-1.2	Parlar 62 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8720-1.2	Parlar 69 (¹³C1₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8721-1.2	Parlar 70 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL

Related Products
Catalog No.	Description	Amount
Inquire	US EPA Method 8276 Composite Stock Standard Mix	1.2 mL
	Unlabeled	Concentration*
	HX-SED	1000
	HP-SED	1000
	Parlar 26	1000
	Parlar 40	1000
	Parlar 41	1000
	Parlar 44	1000
	Parlar 50	1000
	Parlar 62	1000

Related Products
Catalog No.	Description	Amount
Inquire	US EPA Method 8276 Composite Surrogate Standard Mix	1.2 mL
	¹³C Labeled	Concentration*
	Parlar 26	100
	Parlar 50	100
	Parlar 62	100

^{*All concentrations are in ng/mL}

Catalog No.	Description	Amount
PCB-209-CS	Decachlorobiphenyl (PCB-209) (unlabeled) 100 μg/mL in isooctane	1.2 mL
ULM-8984-1.2	Tetrachloro-m-xylene (unlabeled) 100 μg/mL in isooctane	1.2 mL

CIL suggests using isotopically labeled Parlar congeners as internal standards, particularly congeners not corresponding to analytes in the method. CIL recommends the following labeled compounds:

Catalog No.	Description	Concentration	Amount
CLM-8705-1.2	Parlar 32 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8719-1.2	Parlar 39 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8720-1.2	Parlar 69 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL
CLM-8721-1.2	Parlar 70 (¹³C₁₀, 99%)	10 μg/mL in nonane	1.2 mL

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Toxaphene

Toxaphene Congeners

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