Isopropyl Alcohol for Cleaning Flux
in [Basics]
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From: krw on 27 Jul 2010 19:19 On Tue, 27 Jul 2010 18:32:20 -0400, "tm" <the_obamunist(a)whitehouse.gov> wrote: > ><krw(a)att.bizzzzzzzzzzzz> wrote in message >news:6umu46159hqem3o9anb0camshgio9j30gp(a)4ax.com... >> On Mon, 26 Jul 2010 22:30:29 -0700, "Jon Danniken" >> <jonSPAMMENOTdanniken(a)yahSPAMhoo.com> wrote: >> >>>David Nebenzahl wrote: >>>> >>>> Why mess around with isopropyl alcohol at all, since all of it >>>> contains *some* water? Use denatured alcohol (methanol) instead, in a >>>> tightly-capped container to guard against absorbing moisture. >>> >>>Perhaps it is different where you live, but here in the US, denatured >>>alcohol is not methanol; it is, instead, ethanol with a denaturant added. >>>The denaturant can be methanol, or it can be any number of other >>>chemicals, >>>so long as it is sufficiently adulterated to prevent a person from using >>>it >>>for ingestion. >> >> Right. Methanol is a very poor denaturant. The idea is to make it >> undrinkable, not lethal. Someone ralfing their guts out for an hour is >> cheaper than blindness or death. Now, Sterno... > >The treatment for Methanol poisoning is Ethanol and lots of it. Usually by >IV. AIUI, this swamps the liver so it doesn't produce as much formaldehyde at once.
From: Dave Platt on 27 Jul 2010 19:44 In article <6umu46159hqem3o9anb0camshgio9j30gp(a)4ax.com>, krw(a)att.bizzzzzzzzzzzz <krw(a)att.bizzzzzzzzzzzz> wrote: >> >>Perhaps it is different where you live, but here in the US, denatured >>alcohol is not methanol; it is, instead, ethanol with a denaturant added. >>The denaturant can be methanol, or it can be any number of other chemicals, >>so long as it is sufficiently adulterated to prevent a person from using it >>for ingestion. > >Right. Methanol is a very poor denaturant. The idea is to make it >undrinkable, not lethal. Someone ralfing their guts out for an hour is >cheaper than blindness or death. Yup. Recipies for denaturing ethanol seem to vary a lot by country and by intended application of the denatured alcohol. http://www.access.gpo.gov/nara/cfr/waisidx_03/27cfr21_03.html lists a bunch of different formulas that are specifically defined and authorized in the U.S. for certain applications. Some of them seem downright scary: Formula 2-C: To every 100 gallons of alcohol add thirty-three pounds or more of metallic sodium and either 1/2 gallon of benzene, 1/2 gallon of toluene, or 1/2 gallon of rubber hydrocarbon solvent. 5 gallons of methanol per 100 gallons of ethanol is Formula 3-A. -- Dave Platt <dplatt(a)radagast.org> AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads!
From: Dave Platt on 27 Jul 2010 19:53 In article <i2nmh7$2mq$1(a)adenine.netfront.net>, tm <the_obamunist(a)whitehouse.gov> wrote: >> Right. Methanol is a very poor denaturant. The idea is to make it >> undrinkable, not lethal. Someone ralfing their guts out for an hour is >> cheaper than blindness or death. Now, Sterno... > >The treatment for Methanol poisoning is Ethanol and lots of it. Usually by >IV. The same treatment is also used at times in cases of poisoning due to ethylene glycol (antifreeze). If I recall correctly, the idea is to saturate the liver's conversion-enzyme system with ethanol, thus blocking the breakdown of methanol or glycol into toxic byproducts. -- Dave Platt <dplatt(a)radagast.org> AE6EO Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads!
From: GregS on 29 Jul 2010 09:09 In article <jrmu469u6g971p30bt3i94oool6vj2k8ub(a)4ax.com>, "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: >On Tue, 27 Jul 2010 13:50:11 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: > >>In article <g31s46p08a2d3iasq94q31guq46k07n7ra(a)4ax.com>, > "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: >>>On Mon, 26 Jul 2010 19:04:22 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: >>> >>>>In article <slrni4rlsb.9v8.gsm(a)cable.mendelson.com>, gsm(a)mendelson.com > wrote: >>>>>GregS wrote: >>>>> >>>>>> 95% is a very good figure. I actually use the NON-denatured stuff. >>>>> >>>>>How about the drinking stuff? (95% "grain" alcohol). >>>>> >>>>>Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl. >>>>> >>>> >>>> >>>>Yes I was reffering to the ethanol drinkable stuff that is not taxed. >>>>Been used for years in medical parties. >>> >>>Not a wise move. The un-taxed stuff (not for human consumption) often >>>contains benzene. >> >>Thats the 99% stuff that contains benzene. > >Much of the untaxed ethanol uses the benzene process. None of the 95%.
From: krw on 29 Jul 2010 18:24
On Thu, 29 Jul 2010 13:09:34 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: >In article <jrmu469u6g971p30bt3i94oool6vj2k8ub(a)4ax.com>, "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: >>On Tue, 27 Jul 2010 13:50:11 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: >> >>>In article <g31s46p08a2d3iasq94q31guq46k07n7ra(a)4ax.com>, >> "krw(a)att.bizzzzzzzzzzzz" <krw(a)att.bizzzzzzzzzzzz> wrote: >>>>On Mon, 26 Jul 2010 19:04:22 GMT, zekfrivo(a)zekfrivolous.com (GregS) wrote: >>>> >>>>>In article <slrni4rlsb.9v8.gsm(a)cable.mendelson.com>, gsm(a)mendelson.com >> wrote: >>>>>>GregS wrote: >>>>>> >>>>>>> 95% is a very good figure. I actually use the NON-denatured stuff. >>>>>> >>>>>>How about the drinking stuff? (95% "grain" alcohol). >>>>>> >>>>>>Here I can by a "fifth" (750ml) for less than 250ml of 70% Isopropyl. >>>>>> >>>>> >>>>> >>>>>Yes I was reffering to the ethanol drinkable stuff that is not taxed. >>>>>Been used for years in medical parties. >>>> >>>>Not a wise move. The un-taxed stuff (not for human consumption) often >>>>contains benzene. >>> >>>Thats the 99% stuff that contains benzene. >> >>Much of the untaxed ethanol uses the benzene process. > >None of the 95%. I wouldn't bet my life on it. |