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.

Musk Pure is een chemische verbinding, geregistreerd onder CAS-nummer 1222-05-5. Brutoformule: C18H26O. Molaire massa: 258.4 g/mol. IUPAC: 4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopenta[g]isochromene.

Wat is het CAS-nummer van Musk Pure?

Het CAS-nummer van Musk Pure is 1222-05-5 — een unieke identificatie van de Chemical Abstracts Service (CAS).

Wat is de brutoformule van Musk Pure?

Brutoformule: C18H26O. Molaire massa: 258.4 g/mol. logP (XLogP3): 4.8. PSA: 9.2 Å².

Wat zijn de GHS-gevaren van Musk Pure?

Volgens de GHS-classificatie moet Musk Pure worden voorzien van de volgende gevarenaanduidingen: H400 (Zeer giftig voor in het water levende organismen.), H410 (Zeer giftig voor in het water levende organismen, met langdurige gevolgen.).

Waar kan ik Musk Pure kopen?

Musk Pure is verkrijgbaar in onze winkel. Bekijk het product: https://epchems.online/products/musk-pure/

Waar komen de chemische gegevens voor Musk Pure vandaan?

De chemische gegevens voor Musk Pure zijn afkomstig van gezaghebbende bronnen: PubChem (NIH), ChEMBL (EBI). PubChem CID: 91497. Conform de CLP-verordening (EG 1272/2008), beschikbaar onder de CC-BY 4.0-licentie.

Musk Pure

Galaxolide

CAS 1222-05-5 · C₁₈H₂₆O · MW 258.4 g/mol

Over Musk Pure

Musk Pure is een chemische verbinding, geregistreerd onder nummer CAS 1222-05-5, met de brutoformule C₁₈H₂₆O, en een molaire massa van 258.4 g/mol.

Het molecuul bevat 45 atomen verbonden door 47 chemische bindingen. De volledige systematische IUPAC-naam van deze verbinding is 4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopenta[g]isochromene. 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 = 4.8 (positieve waarde, lipofiele verbinding), polair oppervlak PSA = 9.2 Å², 0 donoren en 1 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	C₁₈H₂₆O
Masa molowa	258.4 g/mol
IUPAC	4,6,6,7,8,8-hexamethyl-1,3,4,7-tetrahydrocyclopenta[g]isochromene
SMILES	`CC1COCC2=CC3=C(C=C12)C(C(C3(C)C)C)(C)C`
InChIKey	`ONKNPOPIGWHAQC-UHFFFAOYSA-N`
logP (XLogP3)	4.8
PSA	9.2 Å²
HBD / HBA	0 / 1
PubChem CID	CID 91497 ↗

GHS-veiligheid

Sygnał: Uwaga

GHS09

H400 — Działa bardzo toksycznie na organizmy wodne

H410 — Działa bardzo toksycznie na organizmy wodne, powodując długotrwałe skutki

Wetenschappelijke literatuur

Literatura naukowa

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

📈 Timeline publikacji (8 artykułów)

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

🔓

Galaxolide and tonalide modulate neuroendocrine activity in marine species from two taxonomic groups.

Ehiguese FO, Rodgers ML, Araújo CVM et al. (2021) · Environmental research

Open AccessDOI ↗PubMed ↗PDF ↗

🔓

Derivation of predicted no effect concentration and ecological risk assessment of polycyclic musks tonalide and galaxolide in sediment.

Li W, Wang L, Wang X et al. (2022) · Ecotoxicology and environmental safety

Open AccessDOI ↗PubMed ↗PDF ↗

Biological responses of alga Euglena gracilis to triclosan and galaxolide and the regulation of humic acid.

Ding T, Wei L, Hou Z et al. (2022) · Chemosphere

$ PaywallDOI ↗PubMed ↗

Galaxolide and Irgacure 369 are novel environmental androgens.

Li M, Wang R, Wang P (2023) · Chemosphere

$ PaywallDOI ↗PubMed ↗

Ball-milled biochar for galaxolide removal: Sorption performance and governing mechanisms.

Zhang Q, Wang J, Lyu H et al. (2019) · The Science of the total environment

$ PaywallDOI ↗PubMed ↗

Individual and combined toxicity of silver nanoparticles and triclosan or galaxolide in the freshwater algae Euglena sp.

Ding T, Wei L, Yue Z et al. (2023) · The Science of the total environment

$ PaywallDOI ↗PubMed ↗

Adverse effect of environmental androgenic compounds Galaxolide and Irgacure 369 on the male reproductive system.

Li M, Wang P (2023) · Reproductive toxicology (Elmsford, N.Y.)

$ PaywallDOI ↗PubMed ↗

Preliminary assessment of galaxolide bioaccessibility in raw and cooked FISH.

Trabalón L, Alves RN, Castro Ó et al. (2018) · Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association

$ 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

Galaxolide · 1222-05-5 · Abbalide · Galoxolide · HHCB · Pearlide · Galaxolide White · hexamethylindanopyran · Cyclopenta[g]-2-benzopyran, 1,3,4,6,7,8-hexahydro-4,6,6,7,8,8-hexamethyl- · Hexahydrohexamethyl cyclopentabenzopyran · 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethyl-cyclopenta-gamma-2-benzopyran · 14170060AT · CHEBI:83784 · Hexahydro-4,6,6,7,8,8-hexamethylcyclopenta-gamma-2-benzopyran · 1,3,4,6,7,8-Hexahydro-4,6,6,7,8,8-hexamethylindeno(5,6-c)pyran

Gegevensbronnen

📊 PubChem CID 91497 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Kopen in de winkel

Musk Pure →

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