I have the bottle in pic below, I just used it to cycle my betta's tank. If it's the same as yours, it is quite safe.
When I first got the bottle several years ago I looked on their website which said just ammonia and water but not the concentration. So I emailed them to ask and they said it was 9.5%. The reason I asked them was because when I used it to feed the filter between betta's, the reading it gave was too high for 9.5%. So, I suggest you add 0.5ml of it once you get your test kit, and check the reading half an hour after adding it (the half hour is to allow it to mix thoroughly) If the reading you get is 0.5, that means your bottle is 9.5% so add another 0.5ml to get 1ppm. If, like mine, you get a reading of 1ppm with the first 0.5ml don't add any more.
