[rollei_list] Re: OT:Photographic Chemistry
- From: Laurence Cuffe <cuffe@xxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Wed, 24 Feb 2010 03:52:15 -0500
On Tuesday, February 23, 2010, at 03:17PM, "Mark Rabiner"
<mark@xxxxxxxxxxxxxxxx> wrote:
>> But Ortho-phenylene Diamine is not toxic. I have some which I
>> occasionally use in the Windisch W665 extreme fine grain formulae.
>>
>> Jim
>>
>>
>> On Feb 23, 2010, at 11:51 AM, Laurence Cuffe wrote:
>>
>> Paraphenylene Diamine is toxic but not madly so, its used in hair dye.
>>
>> All the best
>> Laurence Cuffe
>> ---
>> Rollei List
>>
>http://msds.chem.ox.ac.uk/PH/o-phenylenediamine.html
>Says here to not fill up a watermelon with one and poke in straws.
>
>[Rabs]
>Mark William Rabiner
>
Thats a well laid out safety data web site. Looking at toxicity data is
difficult if you are not used to it and it appears that every thing is very
poisonous. In order to make sense of this type of data used to ask my
students to compare it to the toxicity of common table salt, and gasoline,
these being two substances that they would be more familiar with.
In this case the comparison is with salt and ortho-phenylenediamine is about
six times more toxic, and can also cause skin sensitization.
So not a major panic if you spill some on you, but probably a good idea to wear
gloves.
All the best
Laurence Cuffe
>
>
>---
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