To save this word, you'll need to log in.
Definition of phthalic anhydride
: a crystalline cyclic acid anhydride C8H4O3 used especially in making alkyd resins
Keep scrolling for more
Keep scrolling for more
Comments on phthalic anhydride
What made you want to look up phthalic anhydride? Please tell us where you read or heard it (including the quote, if possible).
Test Your Vocabulary
More Confusing Words—Quiz
- The magician
______moved the selected card to the top of the deck.
Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Test Your Knowledge - and learn some interesting things along the way.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridgedWords at Play
Ask the Editors
Word Games
- More Confusing Words—Quiz
How many of these commonly confused words do you know?
Take the quiz - Name that Thing: Toys and Games Edition
It's all fun and games until someone beats your high score.
Take the quiz - Spell It
Can you spell these 10 commonly misspelled words?
Take the quiz - Bee Cubed
Listen to the words and spell through all three levels.
Play the game
Share phthalic anhydride
Time Traveler for phthalic anhydride
The first known use of phthalic anhydride was in 1855
See more words from the same year