ARA-290 and Phosphate Buffered Saline

[rpm2026]

I Wanted to query the forum about reconstituting ARA-290. I attempted to reconstitute the research peptide with bacriostatic water, but it always gels up after a few days.

I've read recently that phosphate buffered saline(PBS) is a viable solution to the issue. Is PBS safe for research purposes? Any advice around this topic?

Thank you for your insights.

 

[high-tide]

To my understanding, PBS is not considered safe for injection and should not be used.

 

[rpm2026]

To my understanding, PBS is not considered safe for injection and should not be used.

If that is the case, which seems to be true, what is the solution?

 

[swimmer]

My Hospera bac works great for my 290

 

[rpm2026]

My Hospera bca works great for my 290

How many mls are you using? Do you have 10mg vials? Maybe I should try higher mls of bac, which would disslove it better?

 

[swimmer]

Hospira BAC 1ml for 10mg vial

 

[CallieKat]

I tried to reconstitute some that I got from Q last year. It was a mess. Never went clear. I threw all of them out.

 

[rpm2026]

I tried to reconstitute some that I got from Q last year. It was a mess. Never went clear. I threw all of them out.

Mine keeps turning into jelly!

 

[swimmer]

Got my 290 from LN peptides. I just finished the kit. My sciatica seems much better. It dissolves very fast . 30 sec total time. It could be the KLOW or both.

 

[high-tide]

might need to add a little acetic acid to adjust the ph

 

[dengaurav]

Try sodium bicarb I've read 0.10 ml sidoum bicarb and 0.90 bac works great

 

[rpm2026]

might need to add a little acetic acid to adjust the ph

Im gonna try 60/40 acetic and bac and see what happens. So frustrating.

 

[Jfrick11]

I Wanted to query the forum about reconstituting ARA-290. I attempted to reconstitute the research peptide with bacriostatic water, but it always gels up after a few days.

I've read recently that phosphate buffered saline(PBS) is a viable solution to the issue. Is PBS safe for research purposes? Any advice around this topic?

Thank you for your insights. .

For ARA-290, this is pretty common. It’s stable in PBS but often won’t dissolve (or gels) in bacteriostatic water alone.

A typical workaround is to dissolve first in a small volume of sterile, injectable grade PBS, then dilute with bac water once it’s fully in solution. That lowers phosphate concentration, adds preservative, and improves injection tolerance (the PBS alone would be pretty spicy).

Any clinical studies that have been done, used a buffer solution because of this issue.... Often PBS being the one used.

Just avoid lab grade PBS and don’t shake.

 

[rpm2026]

For ARA-290, this is pretty common. It’s stable in PBS but often won’t dissolve (or gels) in bacteriostatic water alone.

A typical workaround is to dissolve first in a small volume of sterile, injectable grade PBS, then dilute with bac water once it’s fully in solution. That lowers phosphate concentration, adds preservative, and improves injection tolerance (the PBS alone would be pretty spicy).

Any clinical studies that have been done, used a buffer solution because of this issue.... Often PBS being the one used.

Just avoid lab grade PBS and don’t shake.

Appreciate the advice! You know a good supplier of injectable grade PBS?

Thanks

 

[Jfrick11]

Appreciate the advice! You know a good supplier of injectable grade PBS?

Thanks

I'm in Mexico, so likely not helpful.

Dig a little and you'll find it in the US (if it's here, it's there ).

I'm not even sure my terminology is correct. Essentially, it should be sterile, isotonic, ph of body fluids (around 7.4), the water used should be WFI (water for injection), low endotoxin levels.

Maybe Google lab grade vs injection grade PBS..... Something like that. Sorry not more helpful

 

[c0c0_ly]

I'm in Mexico, so likely not helpful.

Dig a little and you'll find it in the US (if it's here, it's there ).

I'm not even sure my terminology is correct. Essentially, it should be sterile, isotonic, ph of body fluids (around 7.4), the water used should be WFI (water for injection), low endotoxin levels.

Maybe Google lab grade vs injection grade PBS..... Something like that. Sorry not more helpful

Is this a good option?

 

[Jfrick11]

Is this a good option?

Sorry, I don't understand the question.

 

[c0c0_ly]

Sorry, I don't understand the question.

Sorry, that was supposed to be a link. Here it is: https://biologixusa.com/products/bi...h7-4-sterile-ultra-low-endotoxin-500ml-bottle

 

[Jfrick11]

Sorry, that was supposed to be a link. Here it is: https://biologixusa.com/products/bi...h7-4-sterile-ultra-low-endotoxin-500ml-bottle

Looks good!

 

[rpm2026]

Sorry, that was supposed to be a link. Here it is: https://biologixusa.com/products/bi...h7-4-sterile-ultra-low-endotoxin-500ml-bottle

I wish it came in small 3ml vials to maintain sterility and exposure. Thst has been a big challenge finding pbs