National Select Agent Registry phone numbers for APHIS (301-851-3300) and CDC (404-718-2000).
Last Updated: Monday, May 17, 2010

Permissible Toxin Amounts

The following toxins are not regulated if the amount under the control of a principal investigator, treating physician or veterinarian, or commercial manufacturer or distributor does not exceed, at any time, the amounts indicated in the table below.

HHS Toxins [§73.3(d)(3)] Amount
Abrin 100 mg
Botulinum neurotoxins 0.5 mg
Clostridium perfringens epsilon toxin 100 mg
Conotoxin 100 mg
Diacetoxyscirpenol (DAS) 1000 mg
Ricin 100 mg
Saxitoxin 100 mg
Shiga-like ribosome inactivating proteins 100 mg
Shigatoxin 100 mg
Staphylococcal enterotoxins 5 mg
T-2 toxin 1000 mg
Tetrodotoxin 100 mg

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Animal and Plant Health Inspection Service Agricultural Select Agent Program 4700 River Road Unit 2, Mailstop 22, Cubicle 1A07 Riverdale, MD 20737 FAX: 301-734-3652 E-mail: ASAP@aphis.usda.gov and Centers for Disease Control and Prevention Division of Select Agents and Toxins 1600 Clifton Road NE, Mailstop A-46 Atlanta, GA 30333 FAX: 404-718-2096 E-mail: lrsat@cdc.gov