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.

Was ist Propylenglycol?

Propylenglycol ist eine chemische Verbindung, registriert unter der CAS-Nummer 57-55-6. Summenformel: C3H8O2. Molmasse: 76.09 g/mol. IUPAC: propane-1,2-diol.

Wie lautet die CAS-Nummer von Propylenglycol?

Die CAS-Nummer von Propylenglycol ist 57-55-6 — eine eindeutige Kennung des Chemical Abstracts Service (CAS).

Wie lautet die Summenformel von Propylenglycol?

Summenformel: C3H8O2. Molmasse: 76.09 g/mol. logP (XLogP3): -0.9. PSA: 40.5 Å².

Welche GHS-Gefahren hat Propylenglycol?

Gemäß der GHS-Klassifizierung muss Propylenglycol mit den folgenden Gefahrenhinweisen gekennzeichnet werden: H336 (Kann Schläfrigkeit und Benommenheit verursachen.), H370 (Schädigt die Organe.), H372 (Schädigt die Organe bei längerer oder wiederholter Exposition.).

Wo kann ich Propylenglycol kaufen?

Propylenglycol ist in unserem Shop erhältlich. Produkt ansehen: https://epchems.online/products/propylene-glycol/

Woher stammen die chemischen Daten für Propylenglycol?

Die chemischen Daten für Propylenglycol stammen aus zuverlässigen Quellen: PubChem (NIH), ChEMBL (EBI). PubChem CID: 1030. Konform mit der CLP-Verordnung (EG 1272/2008), verfügbar unter der Lizenz CC-BY 4.0.

Propylenglycol

CAS 57-55-6 · C₃H₈O₂ · MW 76.09 g/mol

Über Propylenglycol

Propylenglycol ist eine chemische Verbindung, registriert unter der Nummer CAS 57-55-6, mit der Summenformel C₃H₈O₂, und einer Molmasse von 76.09 g/mol.

Das Molekül enthält 13 Atome, verbunden durch 12 chemische Bindungen. Der vollständige systematische IUPAC-Name dieser Verbindung lautet propane-1,2-diol. Das interaktive 3D-Modell oben zeigt die räumliche Anordnung der Atome — Sie können es mit der Maus drehen, mit dem Scrollrad zoomen und zwischen den Darstellungsmodi Skelett / Ball & Stick / Space Fill wechseln.

Hinsichtlich der physikalisch-chemischen Eigenschaften der Verteilungskoeffizient logP = -0.9 (negativer Wert, hydrophile Verbindung), polare Oberfläche PSA = 40.5 Å², 2 Donatoren und 2 Wasserstoffbrücken-Akzeptoren. Diese Parameter sind entscheidend für die Beurteilung der Bioverfügbarkeit und der Wechselwirkung mit Biomolekülen.

Die chemischen Daten für diese Verbindung stammen aus PubChem (NIH NLM NCBI), einer der größten chemischen Datenbanken der Welt. Alle Informationen werden automatisch aktualisiert und um GHS-Gefahrenhinweise gemäß der CLP-Verordnung (EG 1272/2008) ergänzt. Das obige Widget darf für Bildungs-, Forschungs- und kommerzielle Zwecke verwendet werden.

Physikalisch-chemische Eigenschaften

Wzór sumaryczny	C₃H₈O₂
Masa molowa	76.09 g/mol
IUPAC	propane-1,2-diol
SMILES	`CC(CO)O`
InChIKey	`DNIAPMSPPWPWGF-UHFFFAOYSA-N`
logP (XLogP3)	-0.9
PSA	40.5 Å²
HBD / HBA	2 / 2
PubChem CID	CID 1030 ↗

GHS-Sicherheit

Sygnał: Niebezpieczeństwo

GHS07

GHS08

H336 — Może wywoływać uczucie senności lub zawroty głowy

H370 — Powoduje uszkodzenie narządów

H372 — Powoduje uszkodzenie narządów poprzez długotrwałe lub powtarzane narażenie

Wissenschaftliche Literatur

Literatura naukowa

20 artykułów · 8 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (20 artykułów)

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

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The crystal structure of coenzyme B12-dependent glycerol dehydratase in complex with cobalamin and propane-1,2-diol.

et al. (2002)

Cytowania: 78Open AccessDOI ↗PubMed ↗PDF ↗

Occurrence of 3-chloro-propane-1,2-diol (3-MCPD) and related compounds in foods: a review.

et al. (2002)

Cytowania: 80$ PaywallDOI ↗PubMed ↗

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Re-evaluation of propane-1,2-diol (E 1520) as a food additive.

et al. (2018)

Cytowania: 6Open AccessDOI ↗PubMed ↗PDF ↗

Solubility and thermodynamic behavior of vanillin in propane-1,2-diol+water cosolvent mixtures at different temperatures.

et al. (2015)

Cytowania: 14$ PaywallDOI ↗PubMed ↗

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Molecular-Level Interactions in Binary Mixtures of 1-Ethyl-3-methylimidazolium Ethylsulfate and Propane-1,2-diol: The Interplay between Intermolecular and Intramolecular Hydrogen Bonding.

(2023)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

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Re-evaluation of propane-1,2-diol esters of fatty acids (E 477) as a food additive.

et al. (2018)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

Validated method for the determination of propane-1,2-diol, butane-2,3-diol, and propane-1,3-diol in cheese and bacterial cultures using phenylboronic esterification and GC-MS.

et al. (2017)

Cytowania: 5$ PaywallDOI ↗PubMed ↗

3-(4-(tert-Octyl)phenoxy)propane-1,2-diol suppresses inflammatory responses via inhibition of multiple kinases.

et al. (2012)

Cytowania: 31$ PaywallDOI ↗PubMed ↗

Synthesis and stability studies of the glutathione and N-acetylcysteine adducts of an iminoquinone reactive intermediate generated in the biotransformation of 3-(N-phenylamino)propane-1,2-diol: implications for toxic oil syndrome.

(2005)

Cytowania: 13$ PaywallDOI ↗PubMed ↗

Perfusion of rabbit kidneys with solutions containing propane-1,2-diol.

et al. (1987)

Cytowania: 12$ PaywallDOI ↗PubMed ↗

A pharmacological study of propane-1,2-diol.

et al. (1982)

Cytowania: 12$ PaywallPubMed ↗

Isobaric Vapor–Liquid Equilibrium for Two Binary Systems{Propane-1,2-diol + Ethane-1,2-diol and Propane-1,2-diol + Butane-1,2-diol} at <i>p</i> = (10.0, 20.0, and 40.0) kPa

Changsheng Yang, Xue Feng, Yankai Sun et al. (2015) · Journal of Chemical & Engineering Data

Cytowania: 23$ PaywallDOI ↗

Cryopreservation of human skin with propane-1,2-diol.

et al. (1996)

Cytowania: 10$ PaywallDOI ↗PubMed ↗

Cryopreservation of human platelets with propane-1,2-diol.

(1990)

Cytowania: 9$ PaywallDOI ↗PubMed ↗

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3-(2-Chloro-5-methylphenoxy)propane-1,2-diol

Alexander A. Bredikhin, Zemfira A. Bredikhina, Aida I. Samigullina et al. (2023) · Molbank

Open AccessDOI ↗PDF ↗

Densities and Viscosities for Binary Liquid Mixtures of Butan-1-ol + Propane-1,2-diol, + Butane-1,2-diol and 2-Methylpropan-1-ol + Propane-1,2-diol, + Butane-1,2-diol from 298.15 to 333.15 K at 0.1 MPa

José J. Cano-Gómez, Gustavo A. Iglesias-Silva, Luis D. Cortez-Sánchez et al. (2017) · Journal of Chemical & Engineering Data

Cytowania: 8$ PaywallDOI ↗

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The Additive Influence of Propane-1,2-Diol on SDS Micellar Structure and Properties.

Gudelj M, Šurina P, Jurko L et al. (2021) · Molecules (Basel, Switzerland)

Cytowania: 3Open AccessDOI ↗PubMed ↗PDF ↗

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Re-evaluation of propane-1,2-diol alginate (E 405) as a food additive.

EFSA Panel on Food Additives and Nutrient Sources added to Food (ANS), Younes M, Aggett P et al. (2018) · EFSA journal. European Food Safety Authority

Cytowania: 3Open AccessDOI ↗PubMed ↗PDF ↗

Novel mutual pro-drugs of 2',3'-dideoxyinosine with 3-octadecyloxy-propane-1,2-diol by straightforward enzymatic regioselective synthesis in acetone.

et al. (2005)

Cytowania: 3$ PaywallDOI ↗PubMed ↗

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Synthesis and Hydrophilicity Analysis of bis(propane-1,2-diol) Terminated Polydimethylsiloxanes (PDMSs).

(2022)

Cytowania: 2Open AccessDOI ↗PubMed ↗PDF ↗

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

Synonyme

propylene glycol · 1,2-propanediol · 57-55-6 · propane-1,2-diol · 1,2-Propylene glycol · 1,2-dihydroxypropane · 2-Hydroxypropanol · Isopropylene glycol · Dowfrost · Sirlene · Methylethyl glycol · Methylethylene glycol · Monopropylene glycol · Trimethyl glycol · Propylene Glycol USP

Datenquellen

📊 PubChem CID 1030 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

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