| 释义 |
aclearsubstancefoundinvariousresinsandberries, used infoodpreservatives,medicalandcosmeticproducts, etc. 苯甲酸（安息香酸）（一种无色物质，可从多种树脂和浆果中提取，用于防腐、医疗和化妆品等）SMART Vocabulary: related words and phrasesChemicals, chemical compounds & gases - acetic acid
- acetone
- acrolein
- acrylamide
- adenine
- aldehyde
- alkaline earth metal
- benzene
- Calor gas
- fluorocarbon
- H2O
- HCFC
- HFC
- hyaluronic acid
- hydrochloric acid
- hydrochlorofluorocarbon
- limescale
- metho
- tartaric acid
- tear gas
See more results » - Benzoic acid, as it exists in the resin, is the natural production of the plant from which the resin is derived.
- Dr. Gregory considers the following process for obtaining benzoic acid the most productive.
- If the solution of the salts of this acid is too dilute and warm, none or only a portion of the benzoic acid will be separated.
- Then procure a small quantity of benzoic acid, which exists in the shape of snowy crystals.
- These crystals, except for a slight sweetness of taste, correspond in characters and tests to benzoic acid.
|