Related Clues:
- In pH terms, not acid
- Substance turning litmus blue
- Soluble compound that turns litmus paper blue
- Lye, for one
- Chemical in drain cleaners
- Caustic drain unclogger
- Caustic stuff in Drano
- A large and violent goddess that reacts with 6
- Something this base has a tendency to be blue in the paper
- Caustic chemical used in making soap
- Chemical in biodiesel factories
- Caustic 'Fight Club' substance
- Oil partner in soapmaking
- Drain-opener ingredient
- Soapmaker's caustic need