Here is a pretty extensive list of: naturally occurring pH indicators that include plants, household chemicals & more.

这里是一个非常广泛的清单：天然酸碱度的指标 ，包括植物，日用化工及其他。

youdao

For more information about how to protect yourself and your kids from these household chemicals, and to get involved in policy change, see the press release here.

FORBES: The Chemicals In Your Couch May Pose Serious Health Risks