apparently (contrary to what I figured), conc. lye does react with glass, forming some complex of sodium-silicate; but this takes years of storage to do any serious harm to the structural integrity of the container. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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NaOH will also etch glass.
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I actually was wondering about this myself recently.
What concerned my more is using mason jars for STB and the metal reacting with the lye/water soln.
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mydriasis wrote:I actually was wondering about this myself recently.
What concerned my more is using mason jars for STB and the metal reacting with the lye/water soln. Especially considering the lids are made of aluminum. "Within your heart is a lotus, and within this lotus is a diamond. This diamond is the source of creation, and in all the creation, there is only one lotus."
"Only from the Heart can you touch the sky." ~ Rumi
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mumbles wrote:NaOH will also etch glass. that's what I meant by reacting with glass, causing harm to the structural integrity but it won't etch it nearly as quickly as CsOH or HF, it takes a while. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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I doubt pyrex or other lab glass will react significantly with NaOH solution shoe
ॐ भूर्भुव: स्व: तत्सवितुर्वरेण्यं । भर्गो देवस्य धीमहि, धीयो यो न: प्रचोदयात्
Love, Gratittude, Compassion, Fearlessness!
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benzyme wrote:mumbles wrote:NaOH will also etch glass. that's what I meant by reacting with glass, causing harm to the structural integrity but it won't etch it nearly as quickly as CsOH or HF, it takes a while. I had a very similar conversation a couple of days ago. I was saying to my friend that he needs to oil his rifle so it doesn't oxidise, and he said: "yeah, this and also for not getting rusty"! Need to calculate between salts and freebases? Click here! Need to calculate freebase or salt percentage at a given pH? Click here!
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Infundibulum wrote:
I had a very similar conversation a couple of days ago. I was saying to my friend that he needs to oil his rifle so it doesn't oxidise, and he said: "yeah, this and also for not getting rusty"!
HaHaHa! /me rubs mossberg with steel wool and typewriter oil "once youve locked yourself into a serious drug collection the tendency is to push it as far as you can..." - hunter s. thompson
~~~~~~~~...You are me and i am you, i will always be with you...~~~~~~~~IAmUsWeYouMe~~~~~~~~
‹maxzar100› YOU are like acid
‹mattimus› dosesdosingdoses
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Ya gotta be careful with NAOH and glass. SWIM has personally had a jar crack on him during the mixing process of water + NAOH. Whether it was the NAOH itself or the heat generated from it is uncertain. Talk about a wild purple mess. From that point on, SWIM always mixes his NAOH and water in a plastic jug and then transfers it to glass once it's thoroughly mixed and cooled down. ...
Anything posted on here is relayed fables from a friend of a friend
who does not own a computer. Since SWIM cannot type these up himself,
I reiterate his fictional ramblings word for word to be a nice guy.
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swim's always done it in a borosilicate beaker, at home, and in the lab.standard protocol the only plastic he puts it in is the waste carboys. "Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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Infundibulum wrote:benzyme wrote:mumbles wrote:NaOH will also etch glass. that's what I meant by reacting with glass, causing harm to the structural integrity but it won't etch it nearly as quickly as CsOH or HF, it takes a while. I had a very similar conversation a couple of days ago. I was saying to my friend that he needs to oil his rifle so it doesn't oxidise, and he said: "yeah, this and also for not getting rusty"! LOL  Benzyme what is the machine in your avatar? As a kemist I never met ILPT in physical form and never talk to him. He share his wisdom, trough my mind, telepathicly only. Please don`t prosecute me, for his possible illegal activities. He is bonkers about chemistry and doesn`t even exist in this primitive reality !!!
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turbomolecular pump"Nothing is true, everything is permitted." ~ hassan i sabbah
"Experiments are the only means of attaining knowledge at our disposal. The rest is poetry, imagination." -Max Planck
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:O charming As a kemist I never met ILPT in physical form and never talk to him. He share his wisdom, trough my mind, telepathicly only. Please don`t prosecute me, for his possible illegal activities. He is bonkers about chemistry and doesn`t even exist in this primitive reality !!!
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I investigated this matter, because I wanted numbers. If in doubt, one want: Borosilicate glass, Akali resistance class ISO 695-A2 or A1 Quote:However, at ambient temperatures caustic solutions up to 30% concentration can be handled by borosilicate glass without difficulty. [..] Alkali attack on borosilicate glass 3.3 as a function of temperature. It can be seen from the corrosion curves in fig. 2 that the attack on the glass surface initially increases as the concentration of the caustic solution increases but after exceeding a maximum it assumes a virtually constant value. Rising temperatures increase the corrosion, while at low temperatures the reaction speed is so low that reduction of the wall thickness is hardly detectable over a number of years.http://www.scientificgla...f_Borosilicate_glass.pdf
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