Aldrich Interactive Handbook - (Page 12)
Catalog Features
Key to Product Listings
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Dichloromethane Methylene chloride [75‑09‑2] Merck 13,6088; Beil. 1,IV,35; Fieser 1,676; 2,273; 4,337; 7,239 CH2Cl2 FW 84.93
mp .................................. −97 °C bp ................. 39.8-40 °C mmHg density ............ 1.325 g/mL, 25 °C n20 ...................................... 1.424 D
EC No. 200-838-9
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Diethyl pyrocarbonate
n
Difluorobutyric
n
vd .............................. 2.9 (vs air) vp ..................... 6.83 psi (20 °C) vp ................... 24.45 psi (55 °C) ait .................................. 1223 °F
DEPC; DEP; Diethyl dicarbonate; Ethoxyformic acid anhydride; Diethyl oxydiformate [1609‑47‑8] Merck 13,8088; Beil. 3,IV,18; Fieser 13,110 O(COOC2H5)2 FW 162.14 Inactivates RNase in solution at about 0.1% (v/v), thus protecting RNA against degradation. Modification reagent for His and Tyr residues in proteins.
bp ............... 93-94 °C/18 mmHg n20 .................................... 1.398 D density ............ 1.101 g/mL, 25 °C n20 .................................... 1.398 D
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anhydrous, ≥99.8%, contains 50‑150 ppm amylene as stabilizer
water .............................................................. ≤0.005% (100 mL pkg) water ..................................................................................... ≤0.001% evapn. residue ................................................................... <0.0005% vp ............................................................................... 6.86 psi (20 °C)
D
L
R: 22-36/37/38
S: 26-36
EC No. 216-542-8
Fp: 69 °C (156.2 °F)
L 22.00%
R: 40 270997-1L
S: 23-24/25-36/37 Sure/Seal™ Sure/Seal™
Fp: >110 °C (>230 °F)
LEL/UEL: 14.00%/ 29.70 296.00 44.70
97% Utilized as an antimicrobial additive,1 a ribonuclease inhibitor,2 a histidine residue modifier,3 and as a reagent for conversion of imines to carbamates.4
Lit. cited: 1. Food Sci. Technol. 57, 343 (1993) 2. Methods Mol. Biol. 28, 37 (1994) 3. J. Biol. Chem. 267, 5916 (1992) 4. Tet. 48, 3445 (1992)
159220-5G 159220-25G 159220-100G glass btl glass btl glass btl 5g 25 g 100 g 21.90 63.30 199.00
270997-100ML
100 mL 12 × 100 mL 1L
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270997-12X100ML Sure/Seal™
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CHROMASOLV® Plus, for HPLC, ≥99.9%, contains 50‑150 ppm amylene as stabilizer Suitable for HPLC, spectrophotometry, environmental testing Pesticide Residue Analysis (as Heptachlor Epoxide) <10 ng/L Pure-Pac® II containers require the Micromatic MacroValve coupler for dispensing solvents, Z560723.
water ....................................................................................... ≤0.01% halogenated residue .. ≤10 ng/L (as 240 nm ............................ 0.10 heptachlor epoxide) 250 nm ............................ 0.02 evapn. residue ........... ≤0.0001% 300-400 nm ................... 0.005 λ ..................................... vs H2O 235 nm ................................ 1.0
> DEP, see Diethyl pyrocarbonate Page 319 DEPC, see Diethyl cyanophosphonate Page 317 DEPC, see Diethyl pyrocarbonate Page 319
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2,2-Difluorobutyric acid 2,2‑Difluorobutanoic acid [2366‑62‑3] C4H6F2O2 FW 124.09
20
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JM
R: 11-34
S: 7-26-36/37-45 250 mg 76.50
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L
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R: 40
S: 23-24/25-36/37 glass btl glass btl
LEL/UEL: 14.00%/22.00% 1L 6×1L 52.90 269.50
701076-250MG
650463-1L 650463-6X1L
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1 Substance name 2 Substance synonyms 3 CAS 4 Molecular formula 5 Linear formula 6 Molecular weight 7 Use statements, citations, features and benefits 8 Substance physical property data: vp – vapor pressure vd – vapor density ait – auto ignition temperature uel – upper explosion limit lel – lower explosion limit 9 Literature references
10 Index references 11 Hazard pictograms 12 Hazard Risk & Safety statements 13 Product grade or special quality 14 Product physical data and analytical specifications 15 Product number 16 Unit size 17 Packaging description 18 Price 19 Cross references 20 New product
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