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 Propyleenglycol?

Propyleenglycol is een chemische verbinding, geregistreerd onder CAS-nummer 57-55-6. Brutoformule: C3H8O2. Molaire massa: 76.09 g/mol. IUPAC: propane-1,2-diol.

Wat is het CAS-nummer van Propyleenglycol?

Het CAS-nummer van Propyleenglycol is 57-55-6 — een unieke identificatie van de Chemical Abstracts Service (CAS).

Wat is de brutoformule van Propyleenglycol?

Brutoformule: C3H8O2. Molaire massa: 76.09 g/mol. logP (XLogP3): -0.9. PSA: 40.5 Å².

Wat zijn de GHS-gevaren van Propyleenglycol?

Volgens de GHS-classificatie moet Propyleenglycol worden voorzien van de volgende gevarenaanduidingen: H336 (Kan slaperigheid of duizeligheid veroorzaken.), H370 (Veroorzaakt schade aan organen.), H372 (Veroorzaakt schade aan organen bij langdurige of herhaalde blootstelling.).

Waar kan ik Propyleenglycol kopen?

Propyleenglycol is verkrijgbaar in onze winkel. Bekijk het product: https://epchems.online/products/propylene-glycol/

Waar komen de chemische gegevens voor Propyleenglycol vandaan?

De chemische gegevens voor Propyleenglycol zijn afkomstig van gezaghebbende bronnen: PubChem (NIH), ChEMBL (EBI). PubChem CID: 1030. Conform de CLP-verordening (EG 1272/2008), beschikbaar onder de CC-BY 4.0-licentie.

Propyleenglycol

CAS 57-55-6 · C₃H₈O₂ · MW 76.09 g/mol

Over Propyleenglycol

Propyleenglycol is een chemische verbinding, geregistreerd onder nummer CAS 57-55-6, met de brutoformule C₃H₈O₂, en een molaire massa van 76.09 g/mol.

Het molecuul bevat 13 atomen verbonden door 12 chemische bindingen. De volledige systematische IUPAC-naam van deze verbinding is propane-1,2-diol. 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 = -0.9 (negatieve waarde, hydrofiele verbinding), polair oppervlak PSA = 40.5 Å², 2 donoren en 2 waterstofbrugacceptoren. 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	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-veiligheid

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

Wetenschappelijke literatuur

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.

Synoniemen

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

Gegevensbronnen

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

Kopen in de winkel

Propylene Glycol →

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