Certificates of Analysis

NMA to Orange

NMA, (Methyl-5-Norbornene-2,3-Dicarboxylic Anhydride)

C₁₀H₁₀O₃   F.W. 178.19   CAS #25134-21-8
Specific Gravity @20/20°C : 1.245
b.p. @ 10mm Hg : 140°C
An epoxy hardener

RT	19000		450 ml	18.00	Add to Cart
RT	19001		4x450 ml	66.00	Add to Cart

Nigrosin

(Acid Black 2; Gray R, B, BB; Indulin Black; Nigrosin W, WL ; Silver Gray; Steel Gray)
CAS #8005-03-06
Solubility: 10.0% Water; 0.0% Alcohol; 1.0% Cellosolve; 11.0% Glycol; 0.0% Xylene
For negative staining of bacteria. With Basic Fuchsin, staining bacteria spores. Dorner, Le Lait, 6, 8 (1926). Biochem. Biophys. Acta 69,159 (1963).

RT

19010

25g

36.00

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Nile Blue A

(Basic Blue 12, Nile Blue Sulfate)
(C₂₀H₂₀N₃O)₂SO₄   F.W. 732.84   CAS #3625-57-8

Solubility: 6.0% Water; 5.0% Alcohol; 5.0% Cellosolve; 5.0% Glycol; 0.25% Xylene.
Dye content: approx. 65%
Differentiates melamins and lipofuscins; Used in fat staining.
Lillie, Stain Tech., 31,151 (1956); J. Histochem., 4,377; Z. Anal. Chem. 260, 290 (1972).
For staining bone sections. Cytologia, 11, 261 (1940)

RT

19020

10g

15.00

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Ninhydrin, Crystal, Reagent

(1,2,3-Triketohydrindene Monohydrate)
C₉O₄·H₂O   F.W. 178.15   CAS #485-47-2

RT

19030

25g

65.00

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Nitro Blue Tetrazolium Chloride

(Nitro, BT, p-Nitrotetrazolium Blue; 2, 2´-Di-p-nitrophenyl-5, 5´diphenyl-[3, 3´-dimethoxy-4, 4´-diphenylene] ditetrazolium chloride)
C₄₀H₃₀Cl₂N₁₀O₆   F.W. 817.6   CAS 298-83-9 

Approx. 98% (TLC).
Contains up to 10% solvent. A substrate for dehydrogenases and other oxidases

0-5°C	19035-01		100mg	50.00	Add to Cart
0-5°C	19035-05		1gm	460.00	Add to Cart

Also available in tablet form. Tablet contains 10mg substrate per tablet.

0-5°C	19035-10		10 tablets/pk	50.00	Add to Cart
0-5°C	19035-12		25 tablets/pk	120.00	Add to Cart

Nitrocellulose

Please see Parlodion Purified Strips.

RT

19220

10g

180.00

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NSA, Nonenyl Succinic Anhydride

Specially Distilled EM Grade
F.W. 227   CAS #28928-97-4
b.p. 325°C
Viscosity: 102.8 at 25°C
Density: 1.08gm/cm³
An epoxy hardener specially distilled. The special distillation process offers you much clearer blocks than the standard NSA

RT	19050		450 ml	26.00	Add to Cart
RT	19051		4x450 ml	96.00	Add to Cart

Orange II

(Acid Orange 7; Acid Orange II, Y or A; Gold Orange; Mandarin G; Orange A, P or R; Orange Extra; Tropaoelin OOO No.2)
C₁₆H₁₁N₂O₄SNa   F.W. 350.33   CAS #633-96-5
Solubility: 3.0% Water; 0.15% Alcohol; 2.5% Cellosolve; 8.0% Glycol; 0.0% Xylene
Dye Content: approx. 75%

A general tissue stain with Eosin and Azur-C. French, Stain Tech., 1, 79 (1926). Counterstain for Heidenhain's Hematoxylin in animal histology. A substitute for Orange G if a stronger yellow is desired for contrast. J. Lab. Med., 28, 995 (1943)

RT

19060

25g

20.00

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Orange G, Certified, C.N. #DcO-13

(Acid Orange 10, Wood Orange 2G)
C₁₆H₁₀N₂O₇S₂Na₂   F.W.. 452.38   CAS #1936-15-8
Solubility: 8.0% Water; 0.22% Alcohol; 1.7% Cellosolve; 3.0% Glycol; 0.0% Xylene Dye Content: approx. 60%

Kornhauser's Quad stain for most elementary structures of tissues. Stain Tech., 18, 985 (1943) Mallory's tissue stain for connective tissue. Mallory, J. Exper. Med., 5,15 (1900). Used with safranin and tannic acid for showing shoot apex in plant tissue. Stain Tech., 18, 105 (1943).

RT

19070

25g

34.00

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Certificates of Analysis

Osmium Tetroxide to Papanicolaou