lethality unit

[akcapr]

Whats is the unit of measure of how lethal or how much of sometin it takes to kill someone? like i know water even has one. I was just gonna see how much chromium oxide it takes/ how poisonous it is.

[BenSon]

I think your refering to the LD50 this is the dose when 50% of the subjects died. It is usually measured in grams or milligrams depending on the subsatnce yes even water has an LD50.

 

~Scot

[akcapr]

subjects as in ppl?

[BenSon]

Subjects as in rats

 

~Scott

[Dak]

the dose which will prove fatal to 50% of rats is the LD50 (rat). the dose which will prove fatal to 50% of humans is LD50 (human), and there is a mathmatical formula for converting LD50 (rat) --> LD50 (human), although its a bit innacurate.

 

also, 50 isnt the only % used (although it is the most common): LD99 is also used for the 'almost always fatal level', LD0.01 is used for the 'this'll hardly ever kill someone' level etc.

 

other toxilogical terms:

 

LCx: lethal concentration at which x% of subjects die

NOEL: no observable effect level

NOAEL: no observable adverse effect level

LOEL: lowest observable effect level

LOAEL: lowest observable adverse effect level.

 

couldnt find much on the toxisity of chromium oxide, the only info i could find is that its NOAEL (chronic)(rat) is estimated at 4.4mg/m³¹, and that it appearst to be mutagenic²

 

 

 

check out reference 2 for a full toxisity report on chromium oxide.

 

(basically, dont eat it)