(Ethylene glycol diglycidyl ether) C8H14O4 F.W. 174.20 CAS #2224-15-9
Specific Gravity (H2O=1) : 1.15, store refrigerated 0-5°C. Note: limited shelf life of about eight months when refrigerated. Embedding resin, component of Quetol kit. Because of the limited shelf life we obtain this item on indent - allow two weeks.
A water miscible epoxy resin used for both light and electron microscopy. Its low viscosity permits easy infiltration and embedding, and yields light-colored blocks.
Kushida, H. et al., (1986) Pro. 11th Int. Cong. Electron Microsc., p. 2177. Kyoto.
Store the Quetol refrigerated, even then the shelf life is only about eight months. Because of the limited shelf life we obtain this item on indent - allow two weeks.
- 225mL Quetol 651 (C058)
- 450mL NMA (C046)
- 450mL NSA (C059)
- 50mL DMP-30 (C053)
Also called Basic Violet 10. C28H31CIN2O3 Dye content ~80%; soluble in water and ethanol.
Conn's Biological Stains, 9th ed,; Lillie, RD, Ed; Williams & Wilkins, Baltimore 1977, P332
Colour Index #45440
Acid Red 94.4,5,6,7-Tetrachloro-2',4',5'7'-tetraiodofluorescein sodium salt.
For Conn's technique for staining bacteria and in the Kreyberg method for keratin. Total dye content 80%.
[(NH3)5RuORu(NH3)4ORu(NH3)5]Cl6·4H2O F.W.858.42 CAS #11103-72-3
- Stain for monopolysaccharides and tight junctions. Luft, J.T., Proc. 6th Int. Cong. Em (1966); J. Cell. Biol., 57, 874 (1973).
- Stain for pectin and for diverse cell surfaces. J. Cell Biol.,23, 54A (1964).
- "Positive Staining for EM" van Nostrand Reinhold Co., New York, NY (1975) pp 163-165.
- Ruthenium Red and Violet II. Fine structural localisation in animal tissues. Luft J.H. Anat. Rec., 171:369, (1971a)
- Structure and staining characteristics of myofiber external lamina. Zacks, S.I. et al. J. Histochem. Cytochem., 21:703 (1973)
- Glycoaminoglycans in developing chick-embryo aorta revealed by ruthenium red: an electron microscopy study. Kadar, A. et al. J. Pathol., 108:275 (1973)
- Uptake of marker particles by in vitro ventilated and perfused rat lung. Vidic, B. Am. J. Anat., 138:521 (1973)
Colour Index #50240
For use as a chromosome stain in the Flemming triple stain, in combination with Light Green SF Yellowish or Fast Green FCF, and in Gram stains.
Minimum dye content 80%.
Desiccant, technical grade
Silica gel is a desiccant (drying agent) with the capacity to absorb 27% of its weight in water within one day at 80% relative humidity. Bulk density is about 0.7 (70g/100mL). 2 to 4mm pellet size range, which equates ASTM mesh 8 to 10. Dry pellets are orange and turn dark green when near saturation. Heat applied to an open container holding silica gel ‐ a hotplate or an oven at 110°C, will restore silica gel to its previous moisture absorbing capability. Unlimited cycles are possible.
Silica gel is produced by the reaction of sulphuric acid with sodium silicate.
Orange silica gel does not contain cobalt, which is the indicator in blue silica gel. Silica gel has very low toxicity and ingesting or inhaling small amounts of silica gel dust is not harmful.
Silica gel does not dry completely below about 105°C. The orange indicating dye may be damaged at temperatures above 125°C. Higher temperatures also cause progressive collapse of the desiccant's fine adsorbent structures. ProSciTech recommends the refurbishing of silica gel between 105 and 120°C for at least 2 hours, depending on depth of pellets.
Silica gel FAQs ‐ Also contains a colour chart showing colour changes of orange silica gel with increasing hydration
Our price for the 25kg drum includes freight to any Australian destination, but GST is always additional.
For molecular sieve see C830 on page C6
AgNO3 F.W.169.89 Assay 99.99% .
Exceeds ACS and Analar specifications. We supply many histopathology laboratories with this chemical.
Swift, J.A., The electron histochemistry of cystine containing proteins in thin transverse section of human hair. J. R. Microsc.Soc., 88,449 (1968). Thiery, J.P., Mise en evidence des Polysaccharides sur coupes fines en microscopie electronique. J.Microsc. (Paris) 6, 987 (1967)
Rambourg, A., An improved silver methenamine technique for the detection of periodic acid-reactive complex carbohydrates with the electron microscope. J. Histochem. Cytochem. 15,409 (1967). Hermandez et al., Periodic acid-chromic acid methenamine silver technique for glycoprotein detection in the electron microscope., J.Histochem.Cytochem. 16,507 (1968). Braak, H., and Braak, E., A simple procedure for electron microscopy of Golgi-impregnated nerve cells. Neurosci. Lett. 32,1 (1982)
Unlike prepared silver epoxies, the powder has an unlimited shelf life and the mixture ratio can be varied to suit. Also, fast-curing or super-strong epoxy may be used as required and silver powder is rather more economical than prepared epoxies.
Note that because of the small particle size the powder and any solutions made are a little yellowish and darker than silver. This relates to particle size and refractive index and not purity.
- Average particle diameter 1.4-3.6(µm) (ASTM B330-82)
- Apparent (tap) density 1.6-2.6 g/cm3 (ASTM B527-81)
- Spec. surface area 0.2-0.6m2/g (Quantachrome Monosorb BET Method)
- Silver contents, minimum 99.9%
- Heavy metals 0.02% (max.); Na + K 0.015% (max.)
Ask for bulk prices for well in excess of 200g please.
Highly water soluble red dye, but has poor solubility in ethanol. Also called Direct Red 80 and in the class of Tetrakisazo dyes. C45H26N10O21S6Na6 with FW1373.125
Employed as a substitute for acid fuchsin in van Gieson type procedures. It is also used for the demonstration of amyloid by hydrogen bonding, in techniques similar to those using Congo red. Like that dye it retains the green birefringence, but is a little darker.
C2H6AsNaO2 :3H2O F.W.214.04.
Sodium dimethyl arsenate. Cacodylic acid‐sodium salt. Buffer for EM.
Toxic and carcinogenic; use gloves and fumehood.
Certificate of Analysis:
Appearance: Small Crystals
Aqueous solution (2g 10mL): Colourless
Assay: % 99.52
Loss on drying: % 25.39
Chlorides: % 0.0050
Sulphates: % 0.0150
Inorganic Arsenic: % 0.0030
NaCl, CAS No. 7647-14-5, MW 58.44.
Sea salt, rock salt, table salt, halite.
Colourless transparent crystals or white crystalline powder, hygroscopic. Assay 99.0% min.
MP 101°C, BP 1461°C
Granular, Reagent Grade.
Insoluble Matters 0.005%
Free Acid (as Citric) 0.02%
Free Alkali 0.05%
Heavy Metals .3ppm
CAS #7782-85-6 Reagent A.C.S.
Loss on Drying @ 105°C 43-50%
pH of a 5% solution @25°C 8.7-9.3
Insoluble Matters <0.005%
Nitrogen Compounds 0.001%
Heavy Metals 0.001%
Hydrate CAS #10049-21-5 Reagent A.C.S.
pH of a 5% solution @25°C-4.1-4.5
Insoluble Matters- <0.01%
Nitrogen Compounds 0.001%
Heavy Metals 0.001%
2N Standardised CAS #1310-73-2. Carbonate-free. This solution is prepared from ACS reagent grade sodium hydroxide. It is standardised colourmetrically against potassium biphthalate as primary reference material. Normal Concentration 1.98-2.02
Na2WO4 :2H2O F.W. 329.86
Assay: 99.0 - 101.0%
Insoluble Matters: 0.01%
Heavy metals: 0.001%
Stocker, J. C., Sodium Tungstate as a stain in Electron Microscopy. Bio.Cell. 29,211 (1977)
ERL is a carcinogen
975g low viscosity embedding kit.
Spurr A. R., J.Ultrastruct.Res., 26, 31-42 (1969)
Request data sheet.
Note: Minor acid number variation of some resins results in a colour change when the mixture is made up: from clear to amber to pink. This does not affect resin performance.
Colour Index #26150
F.W. 456.56 Biological stain. Stains lipids in light and electron microscopy.
Colour Index #26100
Scarlet B. Stains lipids in light and electron microscopy. Minimum dye content is 75%.
Colour Index #26105
Scarlet Red, Scharlach, Solvent Red 24.
Stains lipids in light and electron microscopy. Minimum dye content 80%.