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.

Co to jest 2-Ethylhexanoic Acid?

2-Ethylhexanoic Acid to związek chemiczny zarejestrowany pod numerem CAS 149-57-5. Wzór sumaryczny: C8H16O2. Masa molowa: 144.21 g/mol. IUPAC: 2-ethylhexanoic acid.

Jaki jest numer CAS 2-Ethylhexanoic Acid?

Numer CAS dla 2-Ethylhexanoic Acid to 149-57-5 — unikalny identyfikator Chemical Abstracts Service (CAS).

Jaki jest wzór sumaryczny 2-Ethylhexanoic Acid?

Wzór sumaryczny: C8H16O2. Masa molowa: 144.21 g/mol. logP (XLogP3): 2.6. PSA: 37.3 Å².

Gdzie można kupić 2-Ethylhexanoic Acid?

2-Ethylhexanoic Acid jest dostępny w naszym sklepie. Zobacz produkt: https://epchems.online/products/isooctanoic-acid-multi/

Skąd pochodzą dane chemiczne dla 2-Ethylhexanoic Acid?

Dane chemiczne dla 2-Ethylhexanoic Acid pochodzą z autorytatywnych źródeł: PubChem (NIH). PubChem CID: 8697. Zgodne z Rozporządzeniem CLP (WE 1272/2008), dostępne na licencji CC-BY 4.0.

2-Ethylhexanoic Acid

CAS 149-57-5 · C₈H₁₆O₂ · MW 144.21 g/mol

O związku 2-Ethylhexanoic Acid

2-Ethylhexanoic Acid to związek chemiczny zarejestrowany pod numerem CAS 149-57-5 o wzorze sumarycznym C₈H₁₆O₂ i masie molowej 144.21 g/mol.

Cząsteczka zawiera 26 atomów połączonych 25 wiązaniami chemicznymi. Pełna nazwa systematyczna IUPAC dla tego związku to 2-ethylhexanoic acid. Powyższy interaktywny model 3D pozwala obejrzeć układ przestrzenny atomów — można go obracać myszką, powiększać scrollem oraz przełączać między trybami wizualizacji szkieletowy / Ball & Stick / Space Fill.

Pod względem właściwości fizykochemicznych współczynnik podziału logP = 2.6 (wartość dodatnia, związek lipofilowy), powierzchnia polarna PSA = 37.3 Å², 1 donorów i 2 akceptorów wiązań wodorowych. Te parametry są kluczowe przy ocenie biodostępności i interakcji z biomolekułami.

Dane chemiczne dla tego związku pochodzą z PubChem (NIH NLM NCBI), jednej z największych baz związków chemicznych na świecie. Wszystkie informacje są aktualizowane automatycznie i wzbogacone o tłumaczenia zwrotów GHS zgodne z Rozporządzeniem CLP (1272/2008/WE). Powyższy widget można używać do celów edukacyjnych, badawczych i komercyjnych.

Właściwości fizykochemiczne

Wzór sumaryczny	C₈H₁₆O₂
Masa molowa	144.21 g/mol
IUPAC	2-ethylhexanoic acid
SMILES	`CCCCC(CC)C(=O)O`
InChIKey	`OBETXYAYXDNJHR-UHFFFAOYSA-N`
logP (XLogP3)	2.6
PSA	37.3 Å²
HBD / HBA	1 / 2
PubChem CID	CID 8697 ↗

Literatura naukowa

8 artykułów · 0 open access · Źródła: PubMed, OpenAlex, Semantic Scholar

📈 Timeline publikacji (8 artykułów)

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

Impact of chemical structure on the in vitro hydrolysis of fatty esters of 2-ethylhexanoic acid or 2-ethylhexanol and extrapolation to the in vivo situation.

Obringer C, Lester C, Karb M et al. (2023) · Regulatory toxicology and pharmacology : RTP

$ PaywallDOI ↗PubMed ↗

Inhibition of animal acetyl-coenzyme A carboxylase by 2-(p-chlorophenoxy)-2-methylpropionic acid and 2-ethylhexanoic acid.

Sumida K, Kaneko H, Yoshitake A (1996) · Chemosphere

$ PaywallDOI ↗PubMed ↗

2-Ethylhexanoic acid: subchronic oral toxicity studies in the rat and mouse.

Juberg DR, David RM, Katz GV et al. (1998) · Food and chemical toxicology : an international journal published for the British Industrial Biological Research Association

$ PaywallDOI ↗PubMed ↗

Urine 4-heptanone: a beta-oxidation product of 2-ethylhexanoic acid from plasticisers.

Walker V, Mills GA (2001) · Clinica chimica acta; international journal of clinical chemistry

$ PaywallDOI ↗PubMed ↗

In vitro glucuronidation of peroxisomal proliferators: 2-ethylhexanoic acid enantiomers and their structural analogs.

Hamdoune M, Duclos S, Mounie J et al. (1995) · Toxicology and applied pharmacology

$ PaywallDOI ↗PubMed ↗

Gas chromatographic determination of 2-ethylhexanol and 2-ethylhexanoic acid as derivatives suitable for electron-capture and nitrogen-phosphorus detection after single reaction with heptafluorobutyrylimidazole.

Górski T, Goehl TJ, Jameson CW et al. (1990) · Journal of chromatography

$ PaywallDOI ↗PubMed ↗

In vitro cutaneous metabolism of trioctanoin and transcutaneous passage of 2-ethylhexanoic acid.

(2018)

$ PaywallDOI ↗PDF ↗

Enantioselectivity in the induction of peroxisome proliferation by 2‐ethylhexanoic acid.

(1992)

$ PaywallDOI ↗PDF ↗

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

Synonimy

2-ETHYLHEXANOIC ACID · 149-57-5 · 2-Ethylcaproic acid · Hexanoic acid, 2-ethyl- · Ethylhexanoic acid · Ethylhexoic acid · 2-Ethylhexoic acid · Butylethylacetic acid · 2-Butylbutanoic acid · 3-Heptanecarboxylic acid · 2-ethyl-hexoic acid · alpha-Ethylcaproic acid · 2-Ethyl-1-hexanoic acid · 01MU2J7VVZ · alpha-Ethylhexanoic acid

Data sources

📊 PubChem CID 8697 — NIH
🔬 NIST WebBook — spektroskopia
🌐 Wikidata
💊 ChEMBL — bioaktywność

Kup w sklepie

2-Ethylhexanoic Acid →

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