PG is supposed to be odorless or NEARLY odorless but this has a chemical smell to it, here's what it is Propylene Glycol Pharma Grade Better Than Food Grade 99% + USP/EP PURE , but even 2mg added to 100mls of water smells like hand sanitizer how come? I'm scared to use it now, has anyone else noticed a chemical smell to PG at all?
For the past few years, I have been using Sudocrem and an eyebrow gel quite religiously. However, lately over a couple months, it seems that I have developed an instant sore throat upon applying these products. No skin irritation whatsoever, just a sore throat- which goes away once I wipe off the product.
I looked up the ingredients in both Sudocrem and the Glossier gel and they happen to both have beeswax and propylene glycol. I feel that a throat irritation is quite uncommon with these- anyone else allergic to these ingredients as well? How different is the reaction for you?
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c09466
A semi‐solid process, with ultrafast, high‐yield synthesis and outstanding scalability, is developed to fabricate ZIF‐8 membranes on commercial flat‐sheet ceramic substrates. The membrane is highly selective and durable for C3H6/C3H8 separation. A prototypical plate‐and‐frame membrane module with effective membrane area of about 300 cm2 has been implemented for efficient C3H6/C3H8 separation.
ZIF‐8 membranes have emerged as the most promising candidate for propylene/propane (C3H6/C3H8) separation through its precise molecular sieving characteristics. The poor reproducibility and durability, and high cost, thus far hinder the scalable synthesis and industrial application of ZIF‐8 membranes. Herein, we report a semi‐solid process featuring ultrafast and high‐yield synthesis, and outstanding scalability for reproducible fabrication of ZIF‐8 membranes. The membranes show excellent C3H6/C3H8 separation performance in a wide temperature and pressure range, and remarkable stability over 6 months. The ZIF‐8 membrane features dimethylacetamide entrapped ZIF‐8 crystals retaining the same diffusion characteristics but offering enhanced adsorptive selectivity for C3H6/C3H8. The ZIF‐8 membrane was prepared on a commercial flat‐sheet ceramic substrate. A prototypical plate‐and‐frame membrane module with an effective membrane area of about 300 cm2 was used for efficient C3H6/C3H8 separation.
I would like to ask about advice I was given regarding using Propylene glycol as a solvent for Diazepam pills and adding water to turn it into a suspension .
Does this work, and does Does it stay in suspension ? And has anyone successfully tapered this way?
I tried it with Vodka, and Milk but both didn't agree with me, all it did was uptick my already severe symptoms was unable to taper.
The advice I was given is to using my 2 mg pill, to add 1 to 2 ml of Propylene glycol per 1 mg of pill making it 2 to 4 mg PG for a 2 mg pill , then add 100 ml of water which would make it a suspension .
And that there is no need to shake it, as the Diazepam would be equally distributed throughout just subtract small amounts with a syringe daily.
I was also told to minus the amount of PG from the water e.g if you use 2 mg PG then use 98 ml of water+2 mg of PG which would then=100 ml, and subtract my daily micro cut from there
What can be done do when theory fails to provide a structural candidate? Using experimental isotopic data and a Python program, we establish a carbon backbone structure and eventually identify the elusive heterochiral propylene oxide trimer shown from 89 initial candidates.
The chirality controlled conformational landscape of the trimer of propylene oxide (PO), a prototypical chiral molecule, was investigated using rotational spectroscopy and a range of theoretical tools for conformational searches and for evaluating vibrational contributions to effective structures. Two sets of homochiral (PO)3 rotational transitions were assigned and the associated conformers identified with theoretical support. One set of heterochiral (PO)3 transitions was assigned, but no structures generated by one of the latest, advanced conformational search codes could account for them. With the aid of a Python program, the carbon atom backbone and then the heterochiral (PO)3 structure were generated using 13C isotopic data. Excellent agreement between theoretical and experimental rotational constants and relative dipole moment components of all three conformers was achieved, especially after applying vibrational corrections to the rotational constants.
I have 6 official allergies including PG so I can't use a lot of the common creams that people with eczema use(ex. cerave). None of my creams/non steroid treatments are effective in treating both the itch/rash/dryness other than sometimes my allergy pills and steroid creams, does anyone have any suggestions for creams/treatments?
I'd like to make a volumetric solution of 2-cb-fly in propylene glycol at a concentration of 20mg/ml. I am unable to find any solubility information online though.
Anyone have any experience with this? Thanks
So I ended up with stupidly strong bottles of these to the point where I have to just put a little bit on my finger and lick it off to get faded on it. I dont have any ever clear or plain PG and I know those drugs are already soluble in alcohol so I was wondering if i could split the bottles in half with vodka as the other half so I could accurately measure it. I take it water wouldn't work even though the pg is already holding the substances? Cause I know pg and water mix very well but I wouldn't want the water to ruin the chemical.
Polar functionalized isotactic and syndiotactic polypropylenes (PPs) are synthesized by direct, masking‐reagent‐free propylene and amino–olefin (AO, CH2=CH(CH2) x NnPr2, x=2, 3, 6) copolymerizations using the activated precatalysts rac‐[Me2Si(indenyl)2]ZrMe2 and [Me2C(Cp)(fluorenyl)]ZrMe2, respectively. Polymerization activities at 25 °C are as high as 4208 and 535 kg/(mol h atm) with AO incorporation up to 4.0 mol % and 1.6 mol %, respectively
Polar functionalized isotactic and syndiotactic polypropylenes (PPs) are synthesized by direct, masking‐reagent‐free propylene and amino–olefin (AO, CH2=CH(CH2) x NnPr2, x=2, 3, 6) copolymerizations using the activated precatalysts rac‐[Me2Si(indenyl)2]ZrMe2 and [Me2C(Cp)(fluorenyl)]ZrMe2, respectively. Polymerization activities at 25 °C are as high as 4208 and 535 kg/(mol h atm) with AO incorporation up to 4.0 mol % and 1.6 mol %, respectively. Remarkably, introducing the amino‐olefin comonomers significantly enhances stereoselection for both isotactic (mmmm: 59.5 %→91.0 %) and syndiotactic (rrrr: 66.3 %→81.3 %) products.
I have access to a lot of Propylene Glycol, can I use it, or mix it with say 99% alcohol, to make a case lube instead of buying it?
I know it is used in a lot of food based products and even in personal lube. I also know this food grade (not that it matters much).
Has anyone tried it?
I have an allergy to propylene glycol that causes eczema all up and down my arms, neck and eyelids. Is dipropylene glycol close to the same thing as PG? I don't want to risk trying it if it could cause the same reaction.
does propylene glycol (PG) emulsify mineral oil?
what happens to PG over time in a indoor air environment? - mold, evaporate, harden, etc.
would PG by itself have any effect on wood? - I've found DIY mold and termite treatments that involve mixing PG with borax and/or dish soap, but I'm curious as to what properties the PG alone imparts on wood or is it just an agent for the borax/soap in these mixtures?
Thanks in advance!
I did some patch testing on monday and found out today I'm allergic to two common chemicals: Propylene Glycol and Benzoylperoxide.
Here's the part that confuses me, the doctor did a quick google and says Cetaphil has the Propylene Glycol, but at home I'm reading the back and I can't find it on there at all, the only thing I can find on google is that the Cetaphil Facial Cleanser has the Propylene Glycol but no mention of the moisturing lotion. Regardless I'll stop using it for 4 weeks and see the results, the Cetaphil lotion is literally the only chemical apart from water that touches my skin.
Do you any of you guys have the same allergy? Have you guys done patch testing?
I am looking for a stable place to buy 5%/0.1% minox/finasteride solution (foam or liquid) without propylene glycol. Morr F has PG, so that's a pass for me. Where can I get my hands on this? I would appreciate your response.
A while back I had heard somewhere that ResinAway was largely made with Propylene Glycol. Not sure if that's true (though IIRC it was an ingredient on it's safety sheet), but I bought a bottle to try it out anyway for cleaning prints. Here are some of my findings.
If you're interested, here's an Amazon link for something similar to what I got.
If anyone else has tried this, I'd love to hear if you had a similar experience.
Journal of the American Chemical SocietyDOI: 10.1021/jacs.0c03882
Just would like to get some feedback related to title on what the community knows about these substances and how they feel about these substances.
Please if you have an opposing idea or feeling different then someone else may possibly post don't start an argument. That being said nothing wrong with disagreeing civilly and preferably with linked scientific evidence.
Given some responses may be anecdotal they are still desired as it is the accumulation of anecdotal evidence that can lead the way to the truth.
I find the liquid difficult to get down to the scalp, foams much easier IMO. Does this ingredient make a big difference to overall effectiveness though? :)
All advice and your own experiences welcome. Thanks ☺️🙏🏼
Can I make a 20% LAA serum with 80% propylene glycol? I believe there is a The Ordinary serum that has 20% vit c in propanediol. From some googling I see that ~17% LAA can be dissolved in propanediol? Anyone have any idea what this number will be for propylene glycol? I believe propylene glycol and propanediol are fairly similar but different irritation potential.
So in short, wondering how much LAA can be soluble in propylene glycol and if it is safe to use propylene glycol at such high concentration? Any other stuff I should add to make it better (what preservatives? Do I need a preservative since it'll be low pH?) ?
So I just bought some sweet looking molds to make cute shaped chocolates out of and I want to add around 1-2 ml of propylene glycol which I’ve dissolved flavor in. I know that if you add water to cooling chocolate it completely fucks it and prevents it from hardening
My question: will 1-2 ml of propylene glycol prevent the chocolate from hardening right?
Heyo, anybody have suggestions for deodorant free of those things and reasonably priced? My skin rashes with the former and burns and peels with the latter.
I loved aromaco from lush. It smells great, it's really nice texturally, and works super well. And then I developed a baking soda sensitivity.
I've had a lot of success with pit liquor, but they're too expensive for me to justify continuing to purchase from them. I tried to recreate their deodorant at home by mixing vodka, salt, arrowroot powder, and essential oil. It works better than not wearing deodorant, but not by much.
Meow meow tweet works really well too, but I go through it too quickly for it to economical.
I'm running out of my vodka one soon, so I would really appreciate your suggestions. DIY or store bought are both fine. I am a smelly person with sensitive armpits and it sucks.
What are the rations to keep brew from freezing ????
I’ve been tinkering with formulating a whipped soap base. I found a recipe that called for SCI, CocaB, glycerin, propylene glycol, stearic acid, and water. I happened to have Propanediol 1,3 in my stash, so I used that in place of the propylene glycol and it worked fine. However, I happen to have a lot of sodium lactate (for cold process soap making) and was wondering if theres any reason it wouldn’t work, since it’s also a humectant. I love ingredients that can be used for more than one formula. Thanks in advance!
I am about to order a liter of PG from eBay because it's 10 times cheaper than PG in vape stores and they usually have a PG/VG mix...
So does it matter if Propylene Glycol is Pharmaceutical grade (99%+) or Food / Cosmetic Grade (99.8%)? The only difference I was able to notice is how pure is pharmaceutical grade.
Edit: I bought pharmaceutical 99%+ i hope the powders will melt faster in pharma grade
I recently purchased two vape cartridges containing co2 hash oil extract. The problem was that that cartridges were incompatible with the vape I currently have. I had some 0mg nicotine vape liquid lying around, so I thought "what the heck" and emptied both the cartridges into the vape liquid. I figured that if I did this, then put the vape liquid in a heat bath combined with some vigorous shaking I'd be able to make it into vape liquid. I'm not entirely sure that was the right move, but I'll keep you posted. Does this seem like a good way to fix my problem or did I just waste the cartridges?
After a bad month and a half of facial swelling/welting, I got patch testing done and discovered that I'm allergic to propylene glycol :/.
This stuff is in EVERYTHING. Toothpaste, paint, sour cream (lol).
I have very dry, sensitive, and eczema prone skin, so I'm looking for literally the gentlest PG-free moisturizer options.
Cetaphil lotion doesn't contain PG (or any of the other chemicals I tested positive for), but it causes my eyes to swell up.
So, all that being said... any suggestions?
Think that’s the right thing but don’t know what percentage to use?
This is not about dissolving a drug in PG solution. I tried to dissolve 500mg of Flualprazolam in 200ml of PG solution. Unfortunately I didn’t realize the PG solution was cut with something and is meant for cigar humidifiers. The Flualprazolam just sits at the bottom of the solution no matter how much I agitate it or give it a warm bath. Is there any way I can dissolve the PG solution without destroying my Flualprazolam? Thanks in advance
I'm only seeing posts talking about mixing it with alcohol 40% or higher.
If not would 91% isopropyl alcohol work? I'd be dosing it at 1mg/mL so you wouldn't be consuming a lot of iso.
So maybe I'm late cluing in on this, but I did some searching and couldn't find anything here so I thought I'd share as I only figured this out today. Propylene glycol (an emollient/emulsifier found in many things from shampoos to moisturizers to cake mix) can be a huge trigger when used topically for people with eczema. It's counterintuitive because emollients are supposed to be hydrating and so it's often used in eczema-targeted products but many studies show that people with eczema are at a much higher rate for a contact allergy to PG (sources: National Library of Medicine, American Contact Dermatitis Society, and many other individual papers -- it was the ACDS's allergen of the year in 2018).
I only came across this because I learned it myself the hard way. I personally didn't believe my lifelong genetic eczema was affected by contact allergies because I've done my fair share of spot tests and never found anything. I went to use up an old bottle of shampoo last week that I forgot I had and my eczema, which had been under control for several weeks, suddenly flared back up again. I only thought to check the ingredients today and found that the shampoo was free of the usual suspects -- no fragrance, no drying SLS, etc. -- but it did contain propylene glycol. Reviewed all the other products I was using when my skin cleared up, and none of them had PG. I'll do a few spot tests to confirm it but it feels like a really good start and gives me back some feeling of control.
I guess this is half-PSA, half-personal victory ramble. Anyways, I do hope this helps someone!
I feel messed up a bit but I'm not sure if it's all in my head. Wasn't able to find any info online. Does anybody know if it can affect you transdermally?
Hi just wanted to see if anyone had any thoughts about using epsom salt or PG when refilling lamps i have been told PG works better?Also does anyone know a good Surf i currently use clear dish soap palmolive brand but have had some small.sticking issues with this anyone have a better option?
My friend is a chemistry student and so we'll try to figure out it out ourselves vut any help or advice would be appreciated
ZIF‐8 membrane has emerged as the most promising candidate for propylene/propane (C3H6/C3H8) separation due to its precise molecular sieving characteristics. The poor reproducibility and durability, high cost, thus far pose challenges on the scalable synthesis and industrial application of ZIF‐8 membranes. Herein, we report a semi‐solid process featured with ultrafast and high‐yield synthesis, and outstanding scalability for reproducible fabrication of ZIF‐8 membranes. The resultant membranes exhibit excellent C3H6/C3H8 separation performance in a wide range of temperature and pressure, and remarkable stability over a span of 6 months. The new ZIF‐8 membrane features dimethylacetamide entrapped ZIF‐8 crystals retainning same diffusion charactristics but offering enhanced adsorptive selectivity for C3H6/C3H8. The ZIF‐8 membrane was successfully fabricated on commercial flat‐sheet ceramic substrate. A prototypical plate‐and‐frame membrane module with effective membrane area of about 300 cm2 was implemented for efficient C3H6/C3H8 separation. Overall, the reliable reproducibility and durability as well as scalability of ZIF‐8 membranes have greatly unlocked its commercialization potential.
Polar functionalized isotactic and syndiotactic polypropylenes (PPs) are synthesized by direct, masking reagent‐free propylene + amino‐olefin (AO, CH 2 =CH(CH 2 ) x N n Pr 2 , x = 2, 3, 6) copolymerizations using the activated precatalysts rac ‐[Me 2 Si(indenyl) 2 ]ZrMe 2 and [Me 2 C(Cp)(fluorenyl)]ZrMe 2 , respectively. Polymerization activities at 25 °C are as high as 4208 and 535 kg/(mol·h·atm) with AO incorporation up to 4.0 mol% and 1.6 mol%, respectively. Remarkably, introducing the amino‐olefin comonomers significantly enhances stereoselection for both isotactic ( mmmm : 59.5% → 91.0%) and syndiotactic ( rrrr : 66.3% → 81.3%) products.