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/449/386/product-dating-information-mk.pdf
P6148
Paraformaldehyde
reagent grade, crystalline
Synonyme(s) :
Polyoxymethylene
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About This Item
Produits recommandés
Qualité
reagent grade
Niveau de qualité
Densité de vapeur
1.03 (vs air)
Pression de vapeur
<1.45 mmHg ( 25 °C)
Forme
crystalline
Température d'inflammation spontanée
572 °F
Limite d'explosivité
73 %
Pf
120-170 °C (lit.)
Densité
0.88 g/mL at 25 °C (lit.)
Température de stockage
2-8°C
Chaîne SMILES
[O-]#[C+H2]
InChI
1S/CH2O/c1-2/h1H2
Clé InChI
WSFSSNUMVMOOMR-UHFFFAOYSA-N
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Description générale
Application
Produit(s) apparenté(s)
Mention d'avertissement
Danger
Mentions de danger
Classification des risques
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
Organes cibles
Respiratory system
Code de la classe de stockage
4.1B - Flammable solid hazardous materials
Classe de danger pour l'eau (WGK)
WGK 2
Point d'éclair (°F)
Not applicable
Point d'éclair (°C)
Not applicable
Équipement de protection individuelle
Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges
Listes réglementaires
Les listes réglementaires sont principalement fournies pour les produits chimiques. Seules des informations limitées peuvent être fournies ici pour les produits non chimiques. L'absence d'indication signifie qu'aucun des composants n'est répertorié. Il incombe à l'utilisateur de s'assurer de l'utilisation sûre et légale du produit.
EU REACH Annex XVII (Restriction List)
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How can I determine the shelf life / expiration / retest date of this product?
1 réponse-
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 réponse-
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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What is the difference between formaldehyde and paraformaldehyde?
1 réponse-
Paraformaldehyde is the polymeric form of formaldehyde. It is a solid. Formaldehyde is a gas which when dissolved in water gives a formaldehyde solution. Commercially available formaldehyde solutions usually contain 10-15% methanol, which prevents the formaldehyde from forming the polymeric paraformaldehyde.
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How to prepare solutions of Product P6148, Paraformaldehyde?
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Paraformaldehyde does not dissolve but rather can be depolymerized in solution. Depolymerized solutions can be prepared in water with heating to 55-60°C. If necessary, further addition of 1-2 drops of a sodium hydroxide solution may be required. Some protocols suggest that paraformaldehyde should be prepared in buffered solutions such as phosphate buffer or PBS at approximately pH 7.
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What is the difference between formaldehyde and paraformaldehyde?
1 réponse-
Paraformaldehyde is the polymeric form of formaldehyde. Paraformaldehyde is a solid, and formaldehyde is a gas. Formaldehyde solutions consist of formaldehyde gas dissolved in a solvent of some kind.
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What is the shelf life of Product P6148, Paraformaldehyde?
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The shelf life has not been assigned but guarantee of quality is 1 year from the time of receipt for unopened bottles stored at 2-8 °C. We expect the product to be of good quality for at least 2 years.
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How stable are Product P6148, Paraformaldehyde, solutions?
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Buffered solutions of 2-4% can be stored protected from light for 2-3 weeks at 2-8°C.
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What is the Department of Transportation shipping information for this product?
1 réponse-
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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