noun, often capitalized
ben·​zo·​pur·​pu·​rine | \ ¦ben-(ˌ)zō-ˈpər-pyə-rən, -ˌrēn \
variants: or less commonly benzopurpurin \ ¦ben-​(ˌ)zō-​ˈpər-​pyə-​rən \
plural -s

Definition of benzopurpurine

: any of several closely related direct disazo red dyes: such as
a or benzopurpurine 4B : a red dye made from ortho-tolidine and naphthionic acid and used on cellulosic textiles and as an indicator and plasma stain
b or benzopurpurine 10B : a carmine-red dye made from ortho-dianisidine and naphthionic acid

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for benzopurpurine

International Scientific Vocabulary benz- + purpurine, purpurin

Keep scrolling for more

Learn More about benzopurpurine

Statistics for benzopurpurine

Cite this Entry

“Benzopurpurine.” The Dictionary, Merriam-Webster Inc., Accessed 9 December 2019.

Comments on benzopurpurine

What made you want to look up benzopurpurine? Please tell us where you read or heard it (including the quote, if possible).


contradictory or incongruous words

Get Word of the Day daily email!

Test Your Vocabulary

Semantic Drift Quiz

  • a twisty river
  • Which of the following was once a synonym for fun?
Spell It

Can you spell these 10 commonly misspelled words?

Add Diction

Test Your Knowledge - and learn some interesting things along the way.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!