If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
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For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdf
56750
Imidazole
≥99.5% (GC), flakes, powder or crystals, puriss. p.a.
Synonyma:
1,3-Diaza-2,4-cyclopentadiene, Glyoxaline
Vybrat velikost
| Vám/Skladová položka | Dostupnost | Cena |
|---|---|---|
100 g | Obraťte se na zákaznický servis a vyžádejte si informaci o dostupnosti. | 1 400,00 Kč |
500 g | Obraťte se na zákaznický servis a vyžádejte si informaci o dostupnosti. | 4 640,00 Kč |
1 kg | Obraťte se na zákaznický servis a vyžádejte si informaci o dostupnosti. | 7 100,00 Kč |
Obraťte se na zákaznický servis a vyžádejte si informaci o dostupnosti. | 21 100,00 Kč |
O této položce
1 400,00 Kč
Název produktu
Imidazole, puriss. p.a., ≥99.5% (GC)
vapor pressure
<1 mmHg ( 20 °C)
Quality Segment
grade
puriss. p.a.
assay
≥99.5% (GC)
form
flakes, powder or crystals
ign. residue (900 °C)
≤0.1%
pH
9.5-11.0 (25 °C, 50 mg/mL in H2O)
pKa (25 °C)
6.95
bp
256 °C (lit.)
mp
88-91 °C
solubility
alcohol: soluble(lit.), chloroform: soluble(lit.), pyridine: soluble(lit.), water: soluble(lit.)
anion traces
chloride (Cl-): ≤50 mg/kg, sulfate (SO42-): ≤50 mg/kg
cation traces
Ca: ≤10 mg/kg, Cd: ≤5 mg/kg, Co: ≤5 mg/kg, Cr: ≤5 mg/kg, Cu: ≤5 mg/kg, Fe: ≤5 mg/kg, K: ≤50 mg/kg, Mg: ≤5 mg/kg, Mn: ≤5 mg/kg, Na: ≤50 mg/kg, Ni: ≤5 mg/kg, Pb: ≤5 mg/kg, Zn: ≤5 mg/kg
SMILES string
c1c[nH]cn1
InChI
1S/C3H4N2/c1-2-5-3-4-1/h1-3H,(H,4,5)
InChI key
RAXXELZNTBOGNW-UHFFFAOYSA-N
General description
Application
- For the silylation of alcohols, carboxylic acids, and amines in the presence of silyl chloride in DMF.
- In the peptide coupling using the triphenyl phosphite.
- To prepare acid chlorides from the corresponding carboxylic acids and phosgene.
It can also be used in the following reactions:
- Imidazole-PPh3/I2 catalytic system used in the conversion of alcohols into iodides
- Imidazole-PPh3/I2 is used in the diol deoxygenation reaction.
Other Notes
1 of 1
Tato položka | |||
|---|---|---|---|
| assay ≥99.5% (GC) | assay 99% | assay ≥99% (titration) | assay - |
| solubility alcohol: soluble(lit.), pyridine: soluble(lit.), chloroform: soluble(lit.), water: soluble(lit.) | solubility - | solubility water: 500 mg/mL, clear, colorless to very faintly yellow | solubility - |
| Quality Level 200 | Quality Level 100 | Quality Level 200 | Quality Level 100 |
| form flakes, powder or crystals | form powder | form crystalline powder | form crystals |
| mp 88-91 °C | mp 85-92 °C, 88-91 °C (lit.) | mp 88-91 °C (lit.) | mp - |
| bp 256 °C (lit.) | bp 256 °C (lit.) | bp 256 °C (lit.) | bp - |
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signalword
Danger
hcodes
Hazard Classifications
Acute Tox. 4 Oral - Eye Dam. 1 - Repr. 1B - Skin Corr. 1C
Skladovací třída
6.1C - Combustible acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects
flash_point_f
293.0 °F - closed cup
flash_point_c
145 °C - closed cup
ppe
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
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288-32-4
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Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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