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Rubbing Alcohol 70 %: Isopropanol Made Up with Water
Isopropyl rubbing alcohol is about 70 % pure isopropanol by volume in water, used to clean and disinfect. Measure the 99 % alcohol, add water up to the full volume, and bottle it. It is volatile and flammable: keep it away from flames.
The picture: our diagram, 707 mL of 99 % isopropanol made up to 1000 mL.
初学者
Ten minutes
说明
1
1
Measure the alcohol
Measure the alcohol
Measure 707 mL of 99 % isopropanol into the cylinder (for 1 litre; other sizes in step 4). No flames nearby.
此步骤所需材料：
99% 异丙醇0.707 升所需工具：
量筒2
2
Make up to volume
Make up to volume
Add water up to the 1000 mL mark. Mixing shrinks the volume a little, so stir and top up to the mark again.
此步骤所需材料：
蒸馏水0.3 升所需工具：
量筒3
3
Bottle it
Bottle it
Pour it through the funnel into a clean bottle, close it and label it.
所需工具：
带颈玻璃漏斗
玻璃瓶（无色透明）4
4
How much isopropanol
How much isopropanol
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