formic acid

例句：

1. 1. This form of acid is used in the production of plastics.
   这种酸用于塑料的生产。
2. 2. The chemical was found to have a toxic effect on humans.
   这种化学物质被发现对人类有毒性影响。
3. 3. Formaldehyde is a common ingredient in many household cleaning products.
   甲醛是许多家庭清洁产品中的常见成分。