Nomination Summary for Comfrey & its alkaloids (N98001)

Nominated Substances: Comfrey, Comfrey + Symphytine mixture, Symphytine

Nomination Date: 10/01/1997

Nominator: NIEHS

Rationale: The nomination of comfrey and symphytine by the NIEHS for testing is based on the potential for chronic human exposure and the limited amount of carcinogenicity data.

NTP Principles: 1, 2, 3, 5

Status: Selected


Agents and Status

The following information relates to the specific agent and may include history from earlier or later nominations for this same agent.


CASRN: 72698-57-8

Agent Name: Comfrey

  • No studies are available.

CASRN: COMFREYMIX

Agent Name: Comfrey + Symphytine mixture

  • No studies are available.

CASRN: 22571-95-5

Agent Name: Symphytine

  • No studies are available.