Cacodylic to Durcupan
Cacodylic Acid, Free Acid
(Dimethylarsinic Acid)
(CH3)2AsO2H F.W. 137.99 CAS #75-60-5
Assay 99.5%
| RT | 12200 | 25g | 62.00 | Add to Cart | |
| RT | 12201 | 100g | 225.00 | Add to Cart |
Cacodylic Acid- Sodium Salt, TrihydrateSodium Cacodylate
Sodium dimethyl arsenate
C2H6AsNaO2.3H2O F.W. 214.02 CAS #124-65-2
Certificate of Analysis:
| Identity | Conforming | |
| Appearance | Small Crystals | |
| Color | White | |
| Odor | None | |
| Aqueous solution (2g+10 ml) | Colorless | |
| Assay % | 99.52 | |
| Loss on drying % | 25.39 | |
| Chlorides % | 0.0050 | |
| Sulfates % | 0.0150 | |
| Inorganic Arsenic % | 0.0030 |
| RT | 12300 | 100g | 99.50 | Add to Cart | |
| RT | 12300-25 | 25g | 36.00 | Add to Cart | |
| RT | 12310 | 500g | 425.00 | Add to Cart |
Cadmium
Iodine, Crystal, Reagent, A.C.S.
CdI2 F.W. 366.21 CAS #7790-80-9
Assay min. 99.0%
Used for negative staining.
m.p. 387°C
Possible Carcinogen.
| RT | 12320 | 25g | 23.00 | Add to Cart | |
| RT | 12321 | 100g | 78.00 | Add to Cart |
Calcium
Chloride, Dihydrate, Reagent, A.C.S.
CaCl2·2H2O F.W. 147.02 CAS #10035-04-8
| RT | 12340 | 100g | 19.00 | Add to Cart |
Carbohydrazide
CO(NHNH2)2 F.W. 90.08 CAS #497-18-7
m.p. 152-153°C
For GACH embedding kit.
A water-miscible, lipid-retaining, embedding polymer for E.M.. Heckman, et. al., Ultrastruct. Res., 42,156 (1973).
| RT | 12350 | 25g | 16.00 | Add to Cart |
Carbon Adhesives
Please see listing in Mounting Supplies for Scanning Electron Microscopy.
Polyethylene Glycol
H(OCH2CH2)nOH CAS #25322-68-3
An embedding medium for microscopy and histochemistry.
| Cat# | Polyethylene Glycol | Avg. M.W. |
Density @20°C @60°C |
Melting/ Freezing Range, °C |
Pack | Price | ||
| RT | 19700 | PEG 200
viscous liquid |
190- 210 |
1.2390 1.0922 |
set to glass <-65 | 450 ml | 43.00 | Add to Cart |
| RT | 19710 | PEG 300 viscous liquid |
285- 315 |
1.1250 1.0928 |
-15 to -84 | 450 ml | 23.00 | Add to Cart |
| RT | 19720 | PEG 400 viscous liquid |
380- 420 |
1.1254 1.0930 |
4 to 8 | 450 ml | 20.00 | Add to Cart |
| RT | 19730 | PEG 600 viscous liquid |
570- 630 |
1.1257 1.0930 |
20 to 25 | 450 ml | 40.00 | Add to Cart |
| RT | 19740 | PEG 1000 Waxy |
950- 1050 |
— 1.0926 |
37 to 40 | 1 kilo | 66.00 | Add to Cart |
| RT | 19750 | PEG 1450 Waxy |
1300- 1600 |
— 1.0919 |
43 to 46 | 1 kilo | 90.00 | Add to Cart |
| RT | 19760 | PEG 3350 Waxy |
3000- 3700 |
— 1.0926 |
54 to 58 | 1 kilo | 65.00 | Add to Cart |
| RT | 19770 | PEG 8000 Flakes |
7000- 9000 |
— 1.0845 |
60 to 63 | 1 kilo | 72.00 | Add to Cart |
Gao, K.X., (1993). Polyethylene Glycol as an Embedment for Microscopy and Histochemistry. CRC Press; ISBN# 0-8493-4323-2.
Articles of Interest
The Use of Polyethylene Glycol
Cardolite® NC-513
CH2OCHCH2OC6H4C15H27 F.W. 356 W.P.E. 490
15-M-Phenylglycidyl-(n-pentadecca-8,11-dienyl)
CAS #106-89-8
Specific Gravity: 0.97 at 24°C
A Long-chain, monofunctional epoxide; stable when mixed with resins.
Viscosity 50 cps at 25°C.
| RT | 12400 | 225 ml | 12.00 | Add to Cart |
TechnicalTip
The Use of Flexibilizers and Plasticizers
Carmine, Certified, C.N. #DcCa-16
Alum Lake of Carminic acid
(Natural Red 4)
CAS #1390-65-4
Solubility: 0.0% Water; 0.2% Alcohol; 0.5% Cellosolve; 4.0% Glycol; 0.0% Xylene.
| RT | 12410 | 10 g | 30.00 | Add to Cart |
Cedar Wood Oil
CAS #8000-27-9
Refractive Index @ 20°C 1.504+/-.002
For clearing.
| RT | 12420 | 100 ml | 60.00 | Add to Cart |
Cedar Wood Oil
CAS #8000-27-9
Refractive Index @ 20°C 1.515-1.520
Used as an immersion oil.
| RT | 12430 | 100 ml | 52.00 | Add to Cart |
Certified Dyes For Biological Staining
Please see Stains Chart
Chloroform, Reagent, A.C.S.
CHCl3 FW 119.38 CAS #67-66-3
A.C.S. Specifications:
| Color (APHA) | 10 |
| Density @ 25°C | 1.471-1.476 |
| Residue after Evaporation | 0.001% |
| Acetone & Aldehyde (about 0.00%). | To Pass Test |
| Acid & Chloride | To Pass Test |
| Free Chlorine (Cl). | To Pass Test |
| Lead (Pb) | 0.05ppm |
| Subs. darkened by H2SO4 | To Pass Test |
| Suitability for Dithizone Test. | To Pass Test |
| RT | 12540 | 450 ml | 18.00 | Add to Cart | |
| RT | 12541 | 4x450 ml | 66.00 | Add to Cart |
Chloroform, Glass Distilled
Specifications:
| UV Absorption - 1 cm cell vs H2O | |||||
| wavelength (nm) | 290 | 270 | 260 | 255 | 245 |
| A | 0.01 | 0.02 | 0.05 | 0.15 | 1.0 |
| Assay | 99.7% min. | ||||
| Evaporation Residue | 3ppm max. | ||||
| Water | 0.03% max. | ||||
| RT | 12550 | 100 ml | 12.00 | Add to Cart | |
| RT | 12551 | 4x100 ml | 39.00 | Add to Cart |
Chromic Acid
Reagent, Crystals, A.C.S.
CrO3 FW 99.99 CAS #1333-82-0
A.C.S. Specifications:
| Chloride (Cl) | 0.005% |
| Insoluble Matter | 0.01% |
| Nitrate (NO3) | 0.05% |
| Sodium (Na) | 0.2% |
| Iron, Aluminum, Barium. | 0.03% |
| Sulfate (SO4) | 0.05% |
| Assay | 98% |
| RT | 12555 | 100g | 45.00 | Add to Cart |
Citrate Buffer
Please see listing in Prepared Buffers.
Citric Acid, Anhydrous, Reagent, A.C.S.
C6H8O7 FW 192.13 CAS #77-92-9
A.C.S. Specifications:
| Assay | Min. 99.5% |
| Insoluble Matters | 0.005% |
| Residue after Ignition | 0.02% |
| Chloride | 0.001% |
| Oxalate (C2O4) (about 0.05%) | To Pass Test |
| Phosphate | 0.001% |
| Sulfate | 0.002% |
| Heavy Metal (as Pb) | 2ppm |
| Subs. carbonized by hot H2SO4 | To Pass Test |
| Iron | 3ppm |
| RT | 12480 | Citric Acid, Anhydrous, | 500g | 39.00 | Add to Cart |
Cobalt Napthenate Solution
(55% Cobalt Napthenate; CAS #61789-51-3 and 45% Mineral Spirit; CAS #64742-88-7)
Used as an activator for the Vestopal embedding resin.
| RT | 12500 | Cobalt Napthenate Solution | 10 ml | 7.00 | Add to Cart |
| RT | 12501 | Cobalt Napthenate Solution | 25 ml | 15.00 | Add to Cart |
s-Collidine Buffer
Please see listing in Prepared Buffers.
Collodion, 5% Solution, USP
25% Alcohol, 75% Diethyl Ether in Pyroxylin
CAS #9004-70-0
| RT | 12600 | Collodion, 5% Solution, USP | 100 ml | 18.00 | Add to Cart |
| RT | 12600-30* | Collodion, 5% Solution, USP | 30 ml | 12.00 | Add to Cart |
*We are now offering Collodion in a 30 ml bottle to avoid its classification as a hazardous chemical for shipping purposes.
Collodion (Parlodion), 2% in Amyl Acetate
Highly purified nitrocellulose (parlodion strip) in glass distilled amyl acetate. Useful for forming a negative replica to very fine detail. Two types are available: Our sterile formula which is filtered down to 0.45 micron and our non-sterile formula.
| RT | 12620-00 | Non-Filter 2% Collodion in Amyl Acetate | 100 ml | 32.00 | Add to Cart |
| RT | 12620-10 | Sterile 2% Collodion in Amyl Acetate (Ultra-Pure) | 100 ml | 54.00 | Add to Cart |
| RT | 12620-30* | Non-Filter 2% Collodion in Amyl Acetate | 30 ml | 16.00 | Add to Cart |
| RT | 12620-34* | Non-Filter 2% Collodion in Amyl Acetate | 4 x 30 ml | 44.00 | Add to Cart |
| RT | 12620-50* | Sterile 2% Collodion in Amyl Acetate (Ultra-Pure) | 30 ml | 22.00 | Add to Cart |
| RT | 12620-55* | Sterile 2% Collodion in Amyl Acetate (Ultra-Pure) | 4 x 30 ml | 70.00 | Add to Cart |
*We are now offering Collodion (Parlodian) in a 30 ml bottle to avoid its classification as a hazardous chemical for shipping purposes.
Conjugates; ImmunoGold Reagents
Please see ImmunoGold Reagents.
TechnicalTip:
Staining Solutions
For all of our Staining Solutions.
Cresyl Fast Violet, Certified, C.N.#DcW-5
(Cresyl Violet Acetate)
C18H15N3O3 F.W. 312.34 CAS# 10510-54-0
Solubility: 0.13% water
| RT | 12780 | Cresyl Fast Violet, Certified, | 5 g | 78.00 | Add to Cart |
Please see Cresyl Fast Violet Solution for more information.
Cresyl Fast Violet, (FIRM)
Rapid staining technique that provides high-contrast fluorescence microscopy imaging of resin embedded samples, reminiscint of low magnification transmission electron microscopy.
- Works with Epoxy and Acrylic type resins
- Simply mount your sections on glass slides, air dry, and overlay with 100 microliters FIRM for 30 seconds, wash and coverslip with water or an aqueous mountant. View in Rhodamine channel of a standard wide field Fluorescence Microscope.
- FIRM staining is unique in that the brightly fluorescent dye infiltrates the resin, revealing tissue structures in negative relief, with extremely high contrast and resolution.
- Perfect for previewing specimens prior to EM Analysis
- High Throughput, high contrast image phenotyping of model organisms such as drosophila
- Ideal for material and food science analytical microscopy
| RT | 12780-05 | FIRM for Acrylic Resin Sections | |
10ml | 92.00 | Add to Cart |
| RT | 12780-06 | FIRM for Epoxy Resin Sections | |
10ml | 92.00 | Add to Cart |
Crystal
Violet, Certified, C.N.# DcC-38
(Basic Violet 3; Gentian Violet; Methyl Violet 10B; Hexamethyl Violet)
C25H30N3Cl F.W. 407.99 CAS #548-62-9
Solubility: 9.0% Water; 8.75% Alcohol; 7.5% Cellosolve; 7.0% Glycol; 0.0% Xylene
| RT | 12785 | Crystal Violet | 25 g | 22.00 | Add to Cart |
Please see Crystal Violet Solution for more information.
Deionized Water, Reagent Grade A.C.S.
H2O F.W. 18.02 CAS #7732-18-5
EMS Reagent Grade Water is typically prepared at 18 megohm/cm specific resistance using a reverse osmosis, mixed deionization, activated filtration and final filtration at 0.2 microns.
Color (APHA) <+/-5
Bacteriological purity 0 CFUs/L
Residue after evaporation 10ppm
Coliform negative
| RT | 22800-01 | Deionized Water | 1 gal | 10.00 | Add to Cart |
| RT | 22800-05 | Deionized Water | 5 gal | 42.00 | Add to Cart |
DER 736 Resin
CAS #041638-13-5
Specific Gravity: 1.14
A light colored, flexible epoxy.
Epoxide equivalent weight: 175-205.
Used to simplify infiltration in combination with Epon 812 (Embed 812).
Kushida, J. Electron Micro., 16,278 (1964)
| RT | 13000 | DER 736 Resin | 225 ml | 16.00 | Add to Cart |
| RT | 13001 | DER 736 Resin | 10x225 ml lot | 146.00 | Add to Cart |
TechnicalTip:
Stability of Special Staining Solutions
DER 732 Resin
CAS #26142-30-3
Specific Gravity: 1.06
Used as a flexibilizer in Maraglas 655-epoxy formulation. Relatively low Viscosity (55-100 at 25°C).
Erlandson, J. Cell Bio., 22,704 (1964).
| RT | 13010 | 225 ml | 17.00 | Add to Cart |
DER 332 Resin
CAS #001675-54-3
Specific Gravity : 1.16
A relatively soft embedding resin used when slower polymerization is needed.
Lockwood, Anat. Rec., 150,129 (1964).
| RT | 13030 | 225 ml | 17.00 | Add to Cart |
TechnicalTip:
Stability of Special Staining Solutions
DER
332/732 Embedding Kit
Please see listing in Embedding Media Kits.
Dextrose, Anhydrous, Reagent
(D-Glucose)
C6H12O6 FW 180.16 CAS #50-99-7
| Assay Purity | 99.8% |
| Insolubles | 0.005% |
| Moisture (105°C) | 0.2% |
| Ash | 0.02% |
| Chloride | 0.01% |
| Sulfate and Sulfite | 0.005% |
| Arsenic | 0.00004% |
| Heavy Metal (as Pb) | 0.00005% |
| Iron | 0.00005% |
| RNAse & DNAse Activity | None Detected |
| RT | 13050 | 500g | 18.00 | Add to Cart |
(DAB), 3,3'-Diaminobenzidine, EM Grade, Purified free-base
(3,3',4,4'-Biphenyltetramin)
C12H14N4 F.W. 214.27 CAS #91-95-2
m.p. 173°C
Used as an ultrastructural protein tracer for immuno-cytochemistry. A possible carcinogen.
| 0-5°C | 13060 | 1g | 16.50 | Add to Cart |
(TMB),
3,3,5,5-Tetramethyl Benzidine
A non-carcinogenic substitute for Benzidine (DAB-HCl); used as a sensitive and specific reagent for the detection of blood.
J Hystochem. Cytochem., 26, 106 (1978).
Please see(TMB), 3,3,5,5-Tetramethyl Benzidine for more information.
(DAB-HCl), 3,3-Diaminobenzidine Tetra Hydrochloride, EM Grade
C12H14N4·4HCl F.W. 360.12 CAS #7411-49-6
m.p. 300°C
Used for histochemical localization of peroxidase with DAB and in immunocytochemistry.
Sternberger, et.al., J. Histochem, Cytochem., 18,215 (1970)
| 0-5°C | 13080 | 1g | 21.00 | Add to Cart |
DAB-HCL tablets are on long-term backorder... please check back for updates or select #13080 as a substitute.
We are now offering DAB 4HCl pre-weighed and packed in tablet form, to facilitate your work.
Each tablet contains 10mg. Just break the tablet or tablets in a suitable bottle and add your buffer. All weighing and contact with the solid ( DAB-HCl) is avoided.
| 0-5°C | 13082 | 10 tablets/pk | 115.00 | Add to Cart | |
| 0-5°C | 13083 | 20 tablets/pk | 220.00 | Add to Cart |
(DBP) Dibutyl Phthalate
C6H4(COOC4H9)2 F.W. 278.35 CAS #84-74-2
Specific Gravity: 1.049
A plasticizer for epoxy resins.
| 0-5°C | 13100 | 225 ml | 11.00 | Add to Cart | |
| 0-5°C | 13101 | 10x225 ml | 99.00 | Add to Cart | |
| 0-5°C | 13110 | 450 ml | 22.00 | Add to Cart |
1,2-Dichloroethane, Reagent, A.C.S.
(Ethylene Dichloride)
CH2ClCH2Cl F.W. 98.96 CAS #107-06-2
A.C.S. Specifications
| Color (A.H.S.A.) | 10 |
| Appearance | Clear |
| Odor | Resembling odor of CHCl |
| Density @25°C | 1.241 -1.251 |
| Boiling Range, Incl. 83.5°C | 20°C |
| Residue after Evaporation | 0.002% |
| Titratable Acid | 0.0003 meq/g |
| Water | 0.03% |
| RT | 13250 | 450 ml | 26.00 | Add to Cart | |
| RT | 13251 | 4x450 ml | 80.00 | Add to Cart |
Diethylene Glycol Distearate
| RT | 13255 | 500gm | 148.00 | Add to Cart |
Digitonin, Crystal, Reagent
C56H92029 F.W. 1229.34 CAS #11024-24-1
An additive which stabilizes cholesterol 0.2% digitonin in buffer added to Glutaraldehyde fixative may help to stabilize and retain the fine structural
localization of free cholesterol and cholesterol esters.
* Okros, I Histochemie 13-91, 1968. Windaus, A. Hoop Seyler's Z. Physio. Chem. 65:110, 1910. J. Cell Bio., 40, 802, 1969.
* Temkin, Robert J. (1993); Microscopy Research and Tech. 26:260-271
| RT | 13260 | 1g | 300.00 | Add to Cart |
(DMAE), 2-Dimethylaminoethanol
C4H11NO F.W. 89.14 CAS #108-01-0
Specific Gravity: 0.883-0.888
b.p. 132-134°C
A curing agent for epoxy resins.
| RT | 13300 | 25 ml | 5.50 | Add to Cart |
(DMA) N,N-Dimethylaminoethyl Methacrylate
C8H15NO2 F.W. 157.21 CAS #2867-47-2
Specific Gravity: 0.933
b.p. 76°C
A water soluble monomer.
| RT | 13350 | 450 ml | 15.00 | Add to Cart |
(DMP), 2,2-Dimethoxypropane
(Acetone Dimethyl Acetal)
(CH3)2C(OCH3)2 F.W. 104.15 CAS #77-76-9
Specific Gravity: 0.849
Used as a dehydration agent.
* Miller, L.L. and Jacks, T.J. (1975). Rapid chemical dehydration of samples for electron microscopic examinations. J. Histochem. Cytochem, 23:107
* Thorpe J.R. and Harvey D.M.R. (1979). Optimization and investigation of the use of 2,2-dimethoxypropane as a dehydration agent for plant tissue in TEM. J. Ultrastrut. Res., 68:186
* Beckmann H.J. and Dierichs, R. (1982). Lipid extracting properties of 2,2-Dimethoxypropane as revealed by electron microscopy and thin layer chromatography Histochemistry, 76:407
| RT | 13280 | 450 ml | 30.00 | Add to Cart | |
| RT | 13281 | 4x450 ml | 108.00 | Add to Cart |
TechnicalTip:
The Use of DMP (2,2-Dimethoxy Propane)
DMP-30
(2,4,6-Tri(dimethylaminomethyl) phenol)
F.W. 265.0 CAS #90-72-2
Specific Gravity: 0.973 @ 25°C/25°C
Refractive Index @25°C :1.514
A tertiary amine, used as an accelerator for anhydride cures. One of the most popular accelerators available! Keep as dry as possible. Short shelf life.
Use as fresh as possible.
| RT | 13600 | 25 ml | 4.00 | Add to Cart |
N,N-Dimethylaniline
C6H5N(CH3)2 F.W. 121.18 CAS #121-69-7
Specific Gravity: 0.96 g/ml
| RT | 13360 | 100 ml | 8.00 | Add to Cart |
(DMSO), Dimethyl Sulfoxide, Reagent, A.C.S.
(CH3)2SO FW 78.13 CAS #67-68-5
A.C.S. Specifications:
| Appearance | Clear, Colorless |
| Density (g/ml)@25°C | min. 1.095 |
| Freezing Point | Not below 18.0°C |
| Residue after evaporation | 0.01% |
| Water | 0.2% |
| RT | 13390 | 450 ml | 38.00 | Add to Cart |
TechnicalTip
Divinyl Benzene, Mixed Isomers
C6H4(CH:CH2)2 F.W. 130.19 CAS #1321-74-0
A cross-linking monomer.Inhibited with up to 1,500 ppm p-tert-butyl catechol.
Specific Gravity: 0.91
| RT | 13450 | 100 ml | 12.00 | Add to Cart |
D.D.S.A.
(Dodecenyl Succinic Anhydride)
C16H26O3 F.W. 266.38 CAS #2654-438-7
Specific Gravity: 1.005
| RT | 13700 | 450 ml | 14.00 | Add to Cart | |
| RT | 13701 | 4x450 ml | 49.00 | Add to Cart |
D.D.S.A., Specially Distilled
(Dodecenyl Succinic Anhydride)
Much better than DDSA, we now offer an ultra pure DDSA, distilled by a new, slower process, which has a distinct effect on the color control of embedding resins, and offers complete infiltration of tissues. Produces blocks which are totally transparent.
| RT | 13710 | 450 ml | 26.00 | Add to Cart | |
| RT | 13711 | Lot 4x450 ml | 98.00 | Add to Cart |
DPX Mountant for Microscopy
Pleasesee listing in Adhesives and Mountants.
| RT | 13510 | 100 ml | 56.00 | Add to Cart | |
| RT | 13512 | 500 ml | 105.00 | Add to Cart |
DEPEX Mountant
Please see listing in Adhesives and Mountants.
| RT | 13514 | 100 ml | 63.00 | Add to Cart |
Dulbecco's Phosphate Buffer Saline – D-PBS
All of our Dullbecco's Phosphate Buffer Saline Solutions contain: Potassium Chloride, Potassium Phosphate Monobasic, Sodium Chloride, Sodium Phosphate Dibasic, and D-Glucose. Some formulations may contain additional components. Use the table below as a quick reference for identifying the one that best suits your application. All of the solutions are prepared 1X strength.
| Ingredients | F.W. | Formula I | Formula II | Formula III |
| KCl | 74.56 | X | X | X |
| NaCl | 58.44 | X | X | X |
| Na2HPO4·7H2O | 268.07 | X | X | X |
| KH2PO4 | 136.09 | X | X | X |
| CaCl2·2H2O | 147.02 | X | X | X |
| MgCl2·6H2O | 203.31 | X | X | X |
| Phenol Red | ---- | ---- | 0.2g/L |
| RT | 11772-05 | D-PBS, Formula I, 0.15M | |
500 ml | 24.00 | Add to Cart |
| RT | 11772-10 | D-PBS, Formula I, 0.15M | 1 L | 29.00 | Add to Cart | |
| RT | 11773-05 | D-PBS, Formula II, 0.19M | |
500 ml | 24.00 | Add to Cart |
| RT | 11773-10 | D-PBS, Formula II, 0.19M | 1 L | 30.00 | Add to Cart | |
| RT | 11774-05 | D-PBS, Formula III, 0.15M | |
500 ml | 24.00 | Add to Cart |
| RT | 11774-10 | D-PBS, Formula III, 0.15M | 1 L | 29.00 | Add to Cart |
Durcupan (Water Soluble)
Please see Durcupan (Water Soluble) listing in Embedding Media Kits for more information.
| RT | 14020 | Kit: Please see listing | ||||
| RT | 14021 | Single Component A | |
each | 135.00 | Add to Cart |
| RT | 14022 | Single Component B | |
each | 49.00 | Add to Cart |
Durcupan ACM Epoxy
Please see Durcupan ACM Epoxy listing in Embedding Media Kits for more information.
| RT | 14040 | Kit: Please see listing | ||||
| RT | 14041 | Single Component A | |
each | 99.00 | Add to Cart |
| RT | 14042 | Single Component B | |
each | 99.00 | Add to Cart |
