Hmm
I was probably thinking of cuprics msds my bad. But since someone wants to argue to the death for their "right" to poison me, my kids and the environment:
Ferric chloride - toxicity, ecological toxicity and regulatory information
Check out the environmental toxicology.
The MSDS sheet was written by a major chemical manufacturer btw.
There is apparently not enough evidence either way on either Cuprous or Ferric chloride in relation to whether they are carcinogenic.
Ferric chloride - toxicity, ecological toxicity and regulatory information
(search also for cupric)
There however is ample evidence they can be potentially Fatal and that
Organic Copper compounds are highly environmentally toxic.
Then theres:
https://www.electro-tech-online.com/custompdfs/2009/06/75069.pdf
<i>6 HEALTH HAZARD INFORMATION
------------------------------------------------------------------------------
EFFECTS OF OVEREXPOSURE:
SYMPTOMS OF INGESTION: MAY CAUSE ABDOMINAL PAIN. PROLONGED
VOMITING MAY BEGIN UP TO ONE HOUR AFTER INGESTION OF EXCESSIVE
QUANTITIES OF SOLUBLE IRON SALTS. HEMATEMESIS, DEHYDRATION,
SHOCK, PALLOR, CYANOSIS, HYPOTHERMIA, VASOMOTOR INSTABILITY,
AND COMA MAY FOLLOW. <b>IF DEATH IS NOT IMMEDIATE, IT MAY OCCUR
1-3 DAYS LATER</b>. SURVIVORS MAY DEVELOP REVERSIBLE HEMORRHAGIC
HEPATIC NECROSIS. GASTRIC SCARRING MAY OCCUR AFTER 4 WEEKS.
PYLORIC STENOSIS AND MILD HEPATIC CIRRHOSIS MAY PERSIST.</i>
But you know.. your having to actually be a responsible adult is too much to ask i guess.