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16005

Paraformaldehyd

meets analytical specification of DAC, 95.0-100.5%

Synonym(e):

Polyoxymethylen

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Ihnen/SKUVerfügbarkeitPreis
1 kg
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CHF 69.60
25 kg
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Über diesen Artikel

Lineare Formel:
HO(CH2O)nH
CAS-Nummer:
Molekulargewicht:
30.03 (as monomer)
UNSPSC Code:
12352100
PubChem Substance ID:
NACRES:
NA.22
MDL number:
Assay:
95.0-100.5%
Technique(s):
NMR: suitable
Vapor pressure:
<1.45 mmHg ( 25 °C)

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vapor density

1.03 (vs air)

Quality Segment

vapor pressure

<1.45 mmHg ( 25 °C)

assay

95.0-100.5%

form

powder

autoignition temp.

572 °F

quality

meets analytical specification of DAC

expl. lim.

73 %

technique(s)

NMR: suitable

impurities

residual solvents, in accordance, <0.1% sulfated ash, 10 ppm heavy metals (as Pb)

mp

120-170 °C (lit.)

solubility

water: insoluble

density

0.88 g/mL at 25 °C (lit.)

suitability

in accordance for appearance of solution, suitable for acidity or alkalinity (complying)

storage temp.

2-8°C

SMILES string

[O-]#[C+H2]

InChI

1S/CH2O/c1-2/h1H2

InChI key

WSFSSNUMVMOOMR-UHFFFAOYSA-N

General description

Buffered picric acid-paraformaldehyde fixative is suitable for use in electron microscopy and light-microscopic immunocytochemistry.[1]

Application

Paraformaldehyde was used in the preparation of azomethine ylide, required for the synthesis of amine-modifying single-walled carbon nanotubes.[2] It was also used in the preparation of α-methylenechromanes, α-methylenequinoline and ortho-quinone methides.[3]

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Dieser Artikel
P6148441244158127
description

meets analytical specification of DAC, 95.0-100.5%

description

reagent grade, crystalline

description

prilled, 95%

description

powder, 95%

Quality Level

200

Quality Level

200

Quality Level

200

Quality Level

200

assay

95.0-100.5%

assay

-

assay

95%

assay

95%

technique(s)

NMR: suitable

technique(s)

-

technique(s)

-

technique(s)

-

solubility

water: insoluble

solubility

-

solubility

alcohol and cold water: slightly soluble, ethers, hydrocarbons and carbon tetrachloride: insoluble

solubility

-

form

powder

form

crystalline

form

prilled

form

powder

vapor pressure

<1.45 mmHg ( 25 °C)

vapor pressure

<1.45 mmHg ( 25 °C)

vapor pressure

<1.45 mmHg ( 25 °C)

vapor pressure

<1.45 mmHg ( 25 °C)


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signalword

Danger

Hazard Classifications

Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Carc. 1B - Eye Dam. 1 - Flam. Sol. 2 - Muta. 2 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3

target_organs

Respiratory system

Lagerklasse

4.1B - Flammable solid hazardous materials

wgk

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges



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Questions

1–3 of 3 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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  3. What is the Department of Transportation shipping information for this product?

    1 answer
    1. Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.

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