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If using Chloroxylenol กันเสีย 0.5% the rest is 99.5 water? กันเสีย ? Chloroxylenol should already have a disinfectant effect, right?

Carbomer how is it different from carbopol and what is the difference between Carbopol 20 and carbopol 21?

I've read that the property of alcohol pulls the oil from the skin causing it to dry out...is it true? If it's true, I think that if you add วิตามินอี applied, will it still be on my hands?

If general alcohol gel, do I have to send to the lab as well?

If you want to make gel or spray for germs without alcohol. Which substance can be used? - สารสกัดหัวหอม (see some product claims) or - สารกันเสีย silver nano or - Chloroxylenol lead Can I use it, if yes, what proportion? to kill germs

we can add Vitamin E into alcohol hand sanitizer or not? Will it affect the efficiency of disinfection? rarely seen together

I would like to know that 1.In alcohol 95%, 96.5%, 99.9%, what other ingredients are missing 100%? Use alcohol in the ratio of 70%. What grade of alcohol do you use? If using 95% grade alcohol, the actual proportion of alcohol will not reach 70% because there are other ingredients included.

Washed with tap water. What effect will it have?

I have received the product already. Can it be used at all? - Turn on - Dip in water before wetting the head - and dip it in the substance you want to measure. No need to cal, right? Wait to use it for several months, then cal? How to wash, just release. running water You can keep it right? PS. The ...

For pH Meter lab version, when the probe expires, it can be replaced : how much does it cost?