Free shipping on orders over $199       imaget3joa.png

Order early for pre-holiday delivery. Flinn (or Educational Innovations) will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025, will ship after we return. 

FLINN
Your Safer Source for Science
PAVO
All-In-One Science Solution
Your Safer Source for Science
;
Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax
Email [email protected]

Indigo Carmine

Indigo Carmine 10 g
Indigo Carmine 10 g

C16H8N2Na2O8S2

F.W. 466.37

See more product details

Options:

Hazard Alert

Slightly toxic by ingestion; body tissue irritant. LD50 2000 mg/kg.

Resources

Product Details

Storage:
Organic #9
Disposal:
#26a
Shelf Life:
Indefinite
Soluble:
Water and slightly in alcohol.
Color:
Violet
Odor:
None
CAS No.:
860-22-0. C.I. #73015
Technical Note:
To make a 0.25% solution, add 0.25 g of indigo carmine to 100 mL of 50% ethyl alcohol. Prepare fresh for use; solution does not store well. Color of the solution fades on standing.