Does BMA mean n-butyl methacrylate or isobutyl methacrylate?

In most commercial usage the bare abbreviation means the normal isomer, n-butyl methacrylate, CAS 97-88-1. The branched isomer, isobutyl methacrylate, is a different substance with its own identifiers and a different contribution to copolymer hardness, and the tertiary isomer is different again. Because all three are abbreviated loosely in day-to-day correspondence, an order written as BMA alone is ambiguous. Write the full chemical name and the CAS number on every enquiry, purchase order and goods-inwards record.

Why must the monomer not be blanketed with pure nitrogen?

Because the stabiliser used in commercial methacrylate monomers requires dissolved oxygen to function. It intercepts radicals by a mechanism that consumes oxygen, so a drum stripped of oxygen contains an inhibitor that is chemically present and functionally absent. The correct headspace is air, or air diluted with nitrogen to a specified oxygen content, never an inert blanket. This is one of the very few cases in a chemical store where displacing oxygen makes a material more dangerous rather than less, and it catches people whose instinct is trained on flammable solvents.

How should inhibitor content be read on a certificate?

As a starting condition rather than a permanent property. The certificate reports the inhibitor level at release; that level falls in storage as the stabiliser does its job, and it falls faster in warm conditions, in light and in the presence of contamination. A long-stored drum can meet its original certificate on every other line while having very little inhibitor left. Where storage has been long or uncertain, retest the inhibitor level before charging a reactor rather than relying on the release figure.

What is popcorn polymerisation and why does it matter here?

It is a self-propagating, expanding polymer growth that forms in dead legs, vapour spaces, valve bonnets and residues where inhibitor cannot reach. Once seeded it continues under conditions that would not start a normal polymerisation, and it grows mechanically enough to jam valves and distort equipment. The controls are housekeeping controls: no unswept dead legs, no long-standing residues, no lines left full between campaigns, and clean vessels before refilling. It is not a reason to avoid methacrylate monomers, but it is a reason to design the pipework as if the monomer were reactive, because it is.

How does the butyl ester change a copolymer compared with the methyl one?

The four-carbon ester side chain is flexible and bulky, so it loosens chain packing and lowers the temperature at which the polymer softens. Against the methyl ester it gives a softer, more flexible and more extensible polymer, better adhesion and easier film formation, at the cost of hardness and block resistance. Against the corresponding acrylate it gives a harder polymer with the weathering advantage of the methacrylate backbone. Formulators use it as the soft component of an all-methacrylate system, which keeps the durability while tuning flexibility.

Wat is Methylene Chloride?

Methylene Chloride is een chemische verbinding, geregistreerd onder CAS-nummer 75-09-2. Brutoformule: CH₂Cl₂. Molaire massa: 84.93 g/mol.

Wat is het CAS-nummer van Methylene Chloride?

Het CAS-nummer van Methylene Chloride is 75-09-2 — een unieke identificatie van de Chemical Abstracts Service (CAS).

Wat is de brutoformule van Methylene Chloride?

Brutoformule: CH₂Cl₂. Molaire massa: 84.93 g/mol. logP (XLogP3): 1.25.

Wat zijn de GHS-gevaren van Methylene Chloride?

Volgens de GHS-classificatie moet Methylene Chloride worden voorzien van de volgende gevarenaanduidingen: H351 (Verdacht van het veroorzaken van kanker.).

Waar kan ik Methylene Chloride kopen?

Methylene Chloride is verkrijgbaar in onze winkel. Bekijk het product: https://epchems.online/products/methylene-chloride/

Waar komen de chemische gegevens voor Methylene Chloride vandaan?

De chemische gegevens voor Methylene Chloride zijn afkomstig van gezaghebbende bronnen: PubChem (NIH). PubChem CID: 6344. Conform de CLP-verordening (EG 1272/2008), beschikbaar onder de CC-BY 4.0-licentie.

Methylene Chloride

Dichlorometan

CAS 75-09-2 · CH₂Cl₂ · MW 84.93 g/mol

Over Methylene Chloride

Methylene Chloride is een chemische verbinding, geregistreerd onder nummer CAS 75-09-2, met de brutoformule CH₂Cl₂, en een molaire massa van 84.93 g/mol.

Het molecuul bevat 5 atomen verbonden door 4 chemische bindingen. Het interactieve 3D-model hierboven toont de ruimtelijke rangschikking van de atomen — u kunt het met de muis draaien, met het scrollwiel inzoomen en schakelen tussen de weergavemodi skelet / Ball & Stick / Space Fill.

Wat de fysisch-chemische eigenschappen betreft, de verdelingscoëfficiënt logP = 1.25 (positieve waarde, lipofiele verbinding). Deze parameters zijn cruciaal bij de beoordeling van de biobeschikbaarheid en de interactie met biomoleculen.

De chemische gegevens voor deze verbinding zijn afkomstig van PubChem (NIH NLM NCBI), een van de grootste chemische databanken ter wereld. Alle informatie wordt automatisch bijgewerkt en verrijkt met vertalingen van GHS-gevarenaanduidingen conform de CLP-verordening (EG 1272/2008). De bovenstaande widget mag worden gebruikt voor educatieve, onderzoeks- en commerciële doeleinden.

Fysisch-chemische eigenschappen

Wzór sumaryczny	CH₂Cl₂
Masa molowa	84.93 g/mol
IUPAC	—
SMILES	`ClCCl`
InChIKey	—
logP (XLogP3)	1.25
PSA	—
HBD / HBA	—
PubChem CID	CID 6344 ↗

GHS-veiligheid

Sygnał: Uwaga

GHS08

H351 — Podejrzewa się, że powoduje raka

Wetenschappelijke literatuur

Literatura naukowa

5 artykułów · 2 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (5 artykułów)

Wysokość słupka = liczba artykułów w roku. Hover dla szczegółów.

NTP Toxicology and Carcinogenesis Studies of Dichloromethane (Methylene Chloride) (CAS No. 75-09-2) in F344/N Rats and B6C3F1 Mice (Inhalation Studies).

(1986) · National Toxicology Program technical report series

AI Summary
Dichloromethane is widely used in industrial processes, food preparation, and agriculture and has been used as an inhalation anesthetic and as a fumigant for grain and strawberries.

Cytowania: 27Influential: 1$ PaywallPubMed ↗

🔓

Studies on the nitration of toluene with a nitric acid(V)/dichloromethane mixture

Andrzej Nastała, Paweł Maksimowski, Waldemar Tomaszewski (2018) · Materiały Wysokoenergetyczne / High Energy Materials

Open AccessDOI ↗PDF ↗

🔓

Aquilariae Lignum Methylene Chloride Fraction Attenuates IL-1β-Driven Neuroinflammation in BV2 Microglial Cells.

Lee JS, Jeon YJ, Kang JY et al. (2020) · International journal of molecular sciences

Open AccessDOI ↗PubMed ↗PDF ↗

Methylene Chloride.

Phillips JA (2018) · Workplace health & safety

$ PaywallDOI ↗PubMed ↗

Methylene Chloride Comment.

Goodwin J, Holm F (2023) · New solutions : a journal of environmental and occupational health policy : NS

$ PaywallDOI ↗PubMed ↗

Dane z PubMed (NIH NLM), OpenAlex (CC0), Semantic Scholar (AI2). AI Summary wygenerowane przez Semantic Scholar TLDR. Artykuły z ikoną wymagają płatnego dostępu.

Synoniemen

Methylene chloride · DCM

Gegevensbronnen

📊 PubChem CID 6344 — NIH
🔬 NIST WebBook — spektroskopia
💊 ChEMBL — bioaktywność

Kopen in de winkel

Methylene Chloride →

Gerelateerde moleculen

Propylene carbonate CAS 108-32-7 · C4H6O3 Tetraethylene Glycol CAS 112-60-7 · C8H18O5 Sorbitol CAS 50-70-4 · C6H14O6 L-Alanine CAS 56-41-7 · C3H7NO2 Dipropylene glycol dimethyl ether CAS 111109-77-4 · C8H18O3 Trichloroethylene CAS 127-18-4 · C2Cl4