Thallium

CAS Number

7440-28-0

Synonym

Ramor

Occurrence/Use

Manufacture of electronic devices, semiconductors, special glass; medicine (cardiac imaging). Formerly used as rat and ant poison; this use has been banned in the US since 1972. Not produced in the US since 1984.

Soil Screening

Last CHHSL revision:	1/2005
CHHSL Comments:	For chemical-specific screening levels for use in assessing contaminated sites, please see HHRA Note 3 (DTSC HERO). https://www.dtsc.ca.gov/assessingrisk/humanrisk2.cfm

Water

California Public Health Goals Data

Health Risk Category:	Integumentary toxicity (causes hair loss)
Public Health Goal (mg/L):	0.0001
Public Health Goal - Download:	thall1104.pdf
Cancer Risk at PHG:	n/a
MCL value (mg/L):	0.002
Cancer Risk at MCL:	n/a
Last PHG Revision :	2004
California PHG Comments:	Value established in 1999; reviewed in 2004 without change. OEHHA 2004. Memorandum: Update of Public Health Goal for Thallium OEHHA 1999. Public Health Goal for Thallium