Note, you can buy cans of permethrin based spray for your clothing at places like Runnings. I picked some up last week. About $7-9 a can, depending on the brand.
So you're saying ~.5oz/Gal = bottle-strength Perm spray and you can make ~64 gal of bottle-strength spray for $47 worth of Perm concentrate?Since I did the work in another thread, might as well share this here also...
To make a .5% active ingredient spray using a quart (32 fl oz) of concentrate with 36.8% of the active ingredient, you can mix it with water to create a solution. The calculation is as follows:
To find the cost of 18.39 gallons of spray, we first need to convert the volume from gallons to fluid ounces, as the cost is given in terms of fluid ounces. There are 128 fluid ounces in a gallon, so 18.39 gallons is equivalent to:
- Determine the amount of active ingredient in the concentrate:
- 36.8% of 32 fl oz = 0.368 * 32 fl oz = 11.776 fl oz of active ingredient
- Calculate the amount of water needed to dilute the concentrate to a .5% solution:
- For a .5% solution, the total amount of active ingredient in the final mixture should be 0.5% of the total volume. Let's call the total volume of the final mixture "V".
- The equation to find the total volume "V" is: 0.005 * V = 11.776 fl oz
- Solving for "V": V = 11.776 fl oz / 0.005 = 2355.2 fl oz
- Determine the number of gallons of .5% active ingredient spray:
- Since 1 gallon = 128 fl oz, the total volume in gallons is: 2355.2 fl oz / 128 fl oz/gallon = 18.38671875 gallons
- Therefore, you can make approximately 18.39 gallons of .5% active ingredient spray using a quart of concentrate with 36.8% of the active ingredient in it.
18.39 gallons * 128 fluid ounces/gallon = 2354.72 fluid ounces
Now, we know that 24 fluid ounces of spray costs $17.50. To find the cost of 2354.72 fluid ounces, we can set up a proportion:
24 fluid ounces / $17.50 = 2354.72 fluid ounces / x
Where x is the cost of 2354.72 fluid ounces of spray. Solving for x gives:
x = (2354.72 fluid ounces * $17.50) / 24 fluid ounces x = $17.50 * 98.11333... x = $1718.57
Therefore, 18.39 gallons of the same spray would cost approximately $1718.57.
To make a .5% concentrate spray from a 36.8% concentrate, you would need to dilute it with water. For a gallon (128 fluid ounces) of water, you would need to add approximately 0.43 fl oz of the 36.8% concentrate. This will result in a .5% concentration of the active ingredient in the final solution.
.43 fluid ounces is approximately 12.72 milliliters (ml).
1 milliliter = 1 gram of water = 1cm^3
I smell a potential GROUP BUY opportunity in the works!!!
Ive had a bottle in my garage for 3-4 years and it seems to work fine still, likely store longer in a fridge, not sure about freezing it but it appears to be an oily substance so that could make it last decades?Shelf life of said concentrate ? I would tip over before I got 5 gallons worth used.
There have been reports and concerns regarding NexGard and its potential adverse effects on dogs. NexGard, a popular flea and tick preventative, belongs to a class of drugs known as isoxazolines, which have been associated with neurologic adverse reactions including muscle tremors, ataxia, and seizures in some dogs and cats. The U.S. Food and Drug Administration (FDA) has issued a fact sheet about these potential adverse events associated with isoxazoline flea and tick products.Just picked up some Nexgard for the pup yesterday. That crap went up to $80 for 3 months worth. "ROBBERY"
Sorry did mean to