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245771

Isobutyric anhydride

97%

Synonyma:

2-Methylpropionic anhydride

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Vám/Skladová položkaDostupnostCena
25 mL
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720,00 Kč
540,00 Kč
500 mL
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1 390,00 Kč
1 042,50 Kč
2 L
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3 900,00 Kč
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O této položce

Lineární vzorec:
(CH3)2CHCO2COCH(CH3)2
Číslo CAS:
Molekulová hmotnost:
158.19
UNSPSC Code:
12352100
NACRES:
NA.22
PubChem Substance ID:
EC Number:
202-603-6
Beilstein/REAXYS Number:
386267
MDL number:
Assay:
97%
Form:
liquid

540,00 Kč

Ceníková cena720,00 KčUložit 25 %
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vapor density

5.45 (vs air)

Quality Segment

vapor pressure

10 mmHg ( 67 °C)

assay

97%

form

liquid

autoignition temp.

624 °F

expl. lim.

1.09 %, 87 °F, 7.7 %, 127 °F

refractive index

n20/D 1.406 (lit.)

bp

182 °C (lit.)

mp

−56 °C (lit.)

density

0.954 g/mL at 25 °C (lit.)

functional group

anhydride, ester

SMILES string

CC(C)C(=O)OC(=O)C(C)C

InChI

1S/C8H14O3/c1-5(2)7(9)11-8(10)6(3)4/h5-6H,1-4H3

InChI key

LSACYLWPPQLVSM-UHFFFAOYSA-N

General description

The mechanism of esterification of 1-(1-naphthyl)ethanol by isobutyric anhydride with 4-pyrrolidinopyridine as catalyst was studied.

Application

Isobutyric anhydride was used in the synthesis of 4-O-isobutyryl derivative via reaction with octyl β-D-glucopyranoside in the presence of C2-symmetric chiral 4-pyrrolidinopyridine as a catalyst.

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Tato položka
58360I1754194530
description

97%

description

puriss. p.a., ≥99.5%

description

99%

description

97%

assay

97%

assay

≥99.5% (GC)

assay

99%

assay

97%

Quality Level

200

Quality Level

200

Quality Level

100

Quality Level

200

form

liquid

form

-

form

liquid

form

liquid

bp

182 °C (lit.)

bp

153-154 °C (lit.)

bp

153-154 °C (lit.)

bp

246-248 °C (lit.)

mp

−56 °C (lit.)

mp

−47 °C (lit.)

mp

−47 °C (lit.)

mp

-

refractive index

n20/D 1.406 (lit.)

refractive index

n20/D 1.393

refractive index

n20/D 1.393 (lit.)

refractive index

n20/D 1.428 (lit.)


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pictograms

Skull and crossbonesCorrosion

signalword

Danger

Hazard Classifications

Acute Tox. 3 Dermal - Acute Tox. 3 Oral - Skin Corr. 1B

Skladovací třída

6.1A - Combustible acute toxic Cat. 1 and 2 / very toxic hazardous materials

wgk

WGK 3

flash_point_f

154.4 °F - closed cup

flash_point_c

68 °C - closed cup

ppe

Eyeshields, Faceshields, Gloves, type ABEK (EN14387) respirator filter



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Questions

1–2 of 2 Questions  
  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer
    1. 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.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      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

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer
    1. 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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