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		450ml	16.00
RT	19001		4x450ml	60.00

Nigrosin, Certified, C.I. #50420

(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

30.00

Nile Blue A, Certified, C.I. #51180

(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

32.00

Ninhydrin, Crystal, Reagent

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

RT

19030

25g

49.00

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

0-5ºC	19035-01		100mg	48.00
0-5ºC	19035-05		1gm	425.00

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

0-5ºC

19035-10

10 tablets/pk

50.00

Nitrocellulose,

Please see Parlodion Purified Strips.

RT

19220

10g

50.00

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		450ml	25.00
RT	19051		4x450ml	92.00

Orange II, Certified, C.I. #15510

(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

22.00

Orange G, Certified, C.I. #16230

(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

22.00

Osmium Tetroxide