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HT901 Sigma

Crystal violet solution



Related Categories Cell Biology, Hematology and Histology, Histology Special Stains More...
Quality Level   GMP-IVD
shelf life   Expiry date on the label
IVD   for in vitro diagnostic use


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


HT901 is composed of 2.3% certified crystal violet, 0.1% ammonium oxalate monohydrate, and 20% ethyl alcohol, SD3A.


Kit component of Gram Stain kits HT90A and HT90T (for staining of heat-fixed films and tissue, respectively).

Price and Availability

Tissue Diagnostics

All labs need water

Biomedical Applications
Safety & Documentation

Safety Information

Signal word 
Hazard statements 
Precautionary statements 
UN 1993C 3 / PGIII
WGK Germany 
Flash Point(F) 
98.6 °F
Flash Point(C) 
37 °C


Certificate of Analysis

Certificate of Origin

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
Is Product HT901, Crystal violet solution, used as part of a kit?
Although available separately, this solution is also a component of Gram Stain kits HT90A and HT90T (for staining of heat-fixed films and tissue, respectively).
Is Product HT901, Crystal violet solution, suitable for colony staining, migration or plaque staining?
We recommend Product No. C0775 (Crystal Violet, certified by the Biological Stain Commission), or Fluka Product No. 93770 (Tuerk's solution) for these stains, rather than diluting down the relatively high concentration of Crystal Violet (2.3%) in HT901 to approximately 0.1%.  Product HT901 was formulated for use in the Gram Stain procedure. The product's performance has not been tested for use in colony staining, migration or plaque assays.
What is the formulation of Product HT901, Crystal violet solution?
HT901 is composed of: certified Crystal Violet, 2.3% Ammonium Oxalate, 0.1% 20% denatured ethyl alcohol.
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
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