AO2134

03-09-2015, 16:31

I tried to use a search of permethrin and it didn't turn up anything on my search. Hopefully, this isn't a repeat (but I got a feeling it likely is).

I plan to purchase Permethrin SFR Insecticide 36.8 % at http://store.doyourownpestcontrol.com/permethrin-sfr-insecticide-qt

Previously, I purchased the sawyer permethrin from REI at $16 a bottle. Then I thought to myself, I am not too stupid too function, I should be able to dilute this myself. Mind you I suck at math, science, and life in general.

So I googled a formula for dilution of solutions. I found C1V1=C2V2, where C1 is % of solution (36.8%), V1 is the volume of C1, C2 is % of final solution, and V2 is volume of final solution.

I noticed that the sawyer permethrin I was purchasing had .5% permethrin. So I had a final % goal.

I saw a video from Chad P where he combined 2 oz of permethrin with 1 gallon of water.

1 gallon = 128 oz.

With that, I was ready to go:

C1V1=C2V2.

36.8%*2 oz = C2*130 oz (130 because 128 oz plus original 2 oz of permethrin).

Then you isolate C2 by dividing 130 oz from both sides leaving:

36.8%*2 oz/130 oz = C2. Cancel out the ozs to get:

36.8%/65 = C2

0.566% = C2.

So the final solution is a little high by the .5% standard set by sawyer permethrin at REI. So the online video was comfortable with this.

So, then I looked at the formula again. Since I know what my final solution % was to be, I decided to go a different route.

C1V1=C2V2

36.8%* 2 oz = .5%*V2. Solve for V2. This time, I am solving for my final volume.

36.8 %*2 oz / .5 % =V2.

147.2 oz = V2.

So, you would need 145.2 oz of water to the 2 oz of 36.8 % permethrin.

IF my math and common sense (or lack thereof) is wrong, please let me know.

WARNING: I likely am too stupid to function. You follow this advice at your own risk. I suck at math. I suck at science. I have never mixed chemicals. I am not saying 0.5% is safe. I am just basing it off of what the Sawyer bottle from REI says. You assume your own risk by following any advice given by this idiot.

I plan to purchase Permethrin SFR Insecticide 36.8 % at http://store.doyourownpestcontrol.com/permethrin-sfr-insecticide-qt

Previously, I purchased the sawyer permethrin from REI at $16 a bottle. Then I thought to myself, I am not too stupid too function, I should be able to dilute this myself. Mind you I suck at math, science, and life in general.

So I googled a formula for dilution of solutions. I found C1V1=C2V2, where C1 is % of solution (36.8%), V1 is the volume of C1, C2 is % of final solution, and V2 is volume of final solution.

I noticed that the sawyer permethrin I was purchasing had .5% permethrin. So I had a final % goal.

I saw a video from Chad P where he combined 2 oz of permethrin with 1 gallon of water.

1 gallon = 128 oz.

With that, I was ready to go:

C1V1=C2V2.

36.8%*2 oz = C2*130 oz (130 because 128 oz plus original 2 oz of permethrin).

Then you isolate C2 by dividing 130 oz from both sides leaving:

36.8%*2 oz/130 oz = C2. Cancel out the ozs to get:

36.8%/65 = C2

0.566% = C2.

So the final solution is a little high by the .5% standard set by sawyer permethrin at REI. So the online video was comfortable with this.

So, then I looked at the formula again. Since I know what my final solution % was to be, I decided to go a different route.

C1V1=C2V2

36.8%* 2 oz = .5%*V2. Solve for V2. This time, I am solving for my final volume.

36.8 %*2 oz / .5 % =V2.

147.2 oz = V2.

So, you would need 145.2 oz of water to the 2 oz of 36.8 % permethrin.

IF my math and common sense (or lack thereof) is wrong, please let me know.

WARNING: I likely am too stupid to function. You follow this advice at your own risk. I suck at math. I suck at science. I have never mixed chemicals. I am not saying 0.5% is safe. I am just basing it off of what the Sawyer bottle from REI says. You assume your own risk by following any advice given by this idiot.