2-methyl-2-butene

Substance: fo-265330df8b1f130e Neutral molecule
Source: EF 3.1
Unit: kg
Context: Environmental → Air → Ground level → Urban (>1000 people/square mile)
CAS: 513-35-9
EC: 208-156-3

Dimension: Environmental
Media: Air
Population density: Urban (>1000 people/square mile)
Strata: Ground level

(CH3)2C=CHCH3
1,1,2-Trimethylethylene
2-Methylbutene-2
2-methylbut-2-ene
3-Methyl-2-butene
Amylene
Trimethylethylene
beta-Isoamylene
n-Amylene
2-Butene, 2-methyl-
2-Methyl-2-butylene
Trimethylethene
β-Isoamylene

List	Version	Source flow	Name there	Why this flow
EF	3.1	fe0acd60-3ddc-11dd-a30e-0050c2490048	2-methyl-2-butene	The consensus list is built from this one, so this row is the flow itself rather than something matched to it.
bafu	2026-v1	ff572460-f508-5305-8398-6bfd8eb8088a	2-Butene, 2-methyl-	The CAS numbers are the same (513-35-9); both name the same compartment.
ecoinvent	3.12	79a87f98-0b00-4e7e-86f8-70667307f696	2-Methyl-2-butene	A curator's mapping table (ecoinvent-3.11-biosphere-EF-3.1-biosphere) names this flow.
ecoinvent	3.8	79a87f98-0b00-4e7e-86f8-70667307f696	2-Methyl-2-butene	A curator's mapping table (ecoinvent-3.8-biosphere-EF-3.1-biosphere.json) names this flow.

Source list	Source flow	Name there	Compartment there	Match	Conversion
EF 3.1	fe0acd60-3ddc-11dd-a30e-0050c2490048	2-methyl-2-butene	Emissions/Emissions to air/Emissions to urban air close to ground	exactMatch	—
ecoinvent 3.12	79a87f98-0b00-4e7e-86f8-70667307f696	2-Methyl-2-butene	air / urban air close to ground	exactMatch	—
ecoinvent 3.8	79a87f98-0b00-4e7e-86f8-70667307f696	2-Methyl-2-butene	air / urban air close to ground	exactMatch	—
bafu 2026-v1	ff572460-f508-5305-8398-6bfd8eb8088a	2-Butene, 2-methyl-	emissions to air / high. pop.	closeMatch	—

consensus-flow-list 5
European Commission — JRC 5
ecoinvent Centre 5

Every implementation that says anything about this flow. Published as is what this list did with the row: where more than one implementation states a number and they agree it publishes it as agreed; where only one speaks, as sole; where they disagree it publishes nothing and asks.

Method	Implementation	Category	Place	Factor	Published as
EF 3.1	European Commission — JRC	Ecotoxicity, freshwater	—	0.004693	—
EF 3.1	ecoinvent Centre	Ecotoxicity, freshwater	—	0.004693	—
EF 3.1	consensus-flow-list	Ecotoxicity, freshwater	—	0.004693	agreed
EF 3.1	European Commission — JRC	Ecotoxicity, freshwater_organics	—	0.004693	—
EF 3.1	ecoinvent Centre	Ecotoxicity, freshwater_organics	—	0.004693	—
EF 3.1	consensus-flow-list	Ecotoxicity, freshwater_organics	—	0.004693	agreed
EF 3.1	European Commission — JRC	Human toxicity, non-cancer	—	3.7816e-09	—
EF 3.1	ecoinvent Centre	Human toxicity, non-cancer	—	3.7816e-09	—
EF 3.1	consensus-flow-list	Human toxicity, non-cancer	—	3.7816e-09	agreed
EF 3.1	European Commission — JRC	Human toxicity, non-cancer_organics	—	3.7816e-09	—
EF 3.1	ecoinvent Centre	Human toxicity, non-cancer_organics	—	3.7816e-09	—
EF 3.1	consensus-flow-list	Human toxicity, non-cancer_organics	—	3.7816e-09	agreed
EF 3.1	European Commission — JRC	Photochemical ozone formation - human health	—	1.42	—
EF 3.1	ecoinvent Centre	Photochemical ozone formation - human health	—	1.42	—
EF 3.1	consensus-flow-list	Photochemical ozone formation - human health	—	1.42	agreed

This flow in the difference report

The change log and the PROV-O trail (2 consensus changes)

Open the changes page

These are the heaviest sections of this page and the least often read, so the page does not pay for them until you ask.

Flow JSON

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2-methyl-2-butene

Identity

Context

Alternative labels

Source lists

Concept associations

Characterisation factors

History

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