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Author: Subject: Another potential phthalate source?
fusso
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[*] posted on 25-5-2018 at 21:00
Another potential phthalate source?


Some brands of erasers also contain phthalate plasticizers. Are they good sources of phthalate? Will the rubber react with NaOH to form some difficult to separate side products?




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VSEPR_VOID
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[*] posted on 26-5-2018 at 20:13


Could you provide a source? What kind of erasers?

This is what I found but it is very outdated.
https://patents.google.com/patent/US2404322A/en

[Edited on 27-5-2018 by VSEPR_VOID]




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[*] posted on 27-5-2018 at 01:54


Phthalic anhydride and phthalic acid are difficult to find, but potassium hydrogen phthalate ("KHP") is relatively easy to get (primarily used for buffer solutions). From that it's easy enough to get the acid and then anhydride.



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[*] posted on 29-5-2018 at 08:21


Quote: Originally posted by VSEPR_VOID  
Could you provide a source? What kind of erasers?

This is what I found but it is very outdated.
https://patents.google.com/patent/US2404322A/en

[Edited on 27-5-2018 by VSEPR_VOID]

You mean news articles like this?
https://www.consumer.org.hk/ws_en/news/press/480/erasers.htm...




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battoussai114
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[*] posted on 29-5-2018 at 17:57


Most regulatory agencies either downright ban phtalate plasticizers for products catered to children or set very low permissible concentrations (less than 0,1% weight in the US for instance)
Definitely not a good source unless you own a eraser recycling plant... heck, even then it would probably not be worth it.




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VSEPR_VOID
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[*] posted on 29-5-2018 at 23:20


https://www.ebay.com/itm/HiMedia-GRM3939-500G-Potassium-Hydr...

That is not a bad price.




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[*] posted on 29-5-2018 at 23:30


Quote: Originally posted by fusso  
Some brands of erasers also contain phthalate plasticizers. Are they good sources of phthalate? Will the rubber react with NaOH to form some difficult to separate side products?

Common PET bottles must be much better sources of phthalates.
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fusso
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[*] posted on 29-5-2018 at 23:43


Quote: Originally posted by Outer  
Quote: Originally posted by fusso  
Some brands of erasers also contain phthalate plasticizers. Are they good sources of phthalate? Will the rubber react with NaOH to form some difficult to separate side products?

Common PET bottles must be much better sources of phthalates.
Thats terephthalate



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[*] posted on 2-6-2018 at 08:58


Quote: Originally posted by VSEPR_VOID  
https://www.ebay.com/itm/HiMedia-GRM3939-500G-Potassium-Hydr...

That is not a bad price.

what are the illicit uses that make it "banned" just curious
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[*] posted on 2-6-2018 at 14:28


Nothing illicit, o-phthalates are oestrogen-mimetic (or simply "just" endocrine disruptors) and are probably (one) cause of the world turning more and more "feminine". They can lead to decreased sperm count from frogs to humans and cause male-sterility.
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[*] posted on 13-6-2018 at 05:16
phthalic anhydride


phthalic anhydride and phallamide are both on amazon and ebay under 50$ for 500 grams
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[*] posted on 13-6-2018 at 10:32


Plasticizers- You want plasticizers?

20180613_132843.png - 185kB

[Edited on 6-13-2018 by Bert]




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[*] posted on 17-6-2018 at 19:27


Diethylphthalate is available in many parts of the world in an ethanol solution as a cheap (and very old school) insect repellent lotion. Distill off the ethanol, hydrolyse the ester with excess NaOH (caution not to 'half-hydrolyse it') and then acidify to get the phthalic acid. Home chemistry is definitely a much better use for this product than repelling insects (and exposing yourself to large phthalate doses in the process!).



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