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Cas Database

Name	2-BUTYN-1-OL	EINECS	212-113-4
CAS No.	764-01-2	Density	0.929 g/cm³
PSA	20.23000	LogP	0.00200
Solubility	N/A	Melting Point	- 2.2 °C(lit.)
Formula	C₄H₆O	Boiling Point	148 °C at 760 mmHg
Molecular Weight	70.091	Flash Point	51.7 °C
Transport Information	UN 1987 3/PG 3	Appearance	clear colourless to light yellow liquid
Safety	36/37-26-16	Risk Codes	10-43-52/53-36/37/38
Molecular Structure		Hazard Symbols	Xi,F
Synonyms	1-Hydroxybut-2-yne;2-Butynol;NSC 222371;2-Butynyl alcohol;	Article Data	49

2-BUTYN-1-OL Synthetic route

: 107-19-7
propargyl alcohol

: 74-88-4
methyl iodide

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With lithium; ferric nitrate In ammonia at -50℃; for 2h;	95%
With lithium amide In ammonia	78%
Multistep reaction;
Stage #1: methyl iodide With bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine at 25℃; for 0.166667h; Inert atmosphere; Stage #2: propargyl alcohol at 25℃; for 10h; Inert atmosphere;

: 39637-48-4
2-(but-2-ynyloxy)-tetrahydro-2H-pyran

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With toluene-4-sulfonic acid In methanol	95%
With toluene-4-sulfonic acid In methanol	59%

: 37428-46-9, 37428-53-8, 40605-42-3
3-chloro-2-buten-1-ol

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With sodium hydroxide In cyclohexane; water at 65 - 72℃; for 8h;	88.1%
With potassium hydroxide; tetra-(n-butyl)ammonium iodide In hexane for 12h; Heating;	50%
With ammonia; sodium; ferric nitrate for 14h;	47%
With ammonia; sodium amide Behandeln des Reaktions-Loesung mit NH4Cl;
With ammonia; sodium amide

: 50965-89-4
dilithium salt of propargyl alcohol

: 74-88-4
methyl iodide

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
	85%

: 97231-46-4
1-(methoxymethoxy)but-2-yne

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With bismuth(III) chloride; water In acetonitrile at 50℃; for 3h;	85%

: 83591-03-1
(but-2-yn-1-yloxy)(tert-butyl)dimethylsilane

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With P(MeNCH2CH2)3N In dimethyl sulfoxide at 80℃; for 36h; desilylation;	83%

: 50-00-0
formaldehyd

: 463-49-0
1,2-propanediene

: 5389-87-7
1-chloro-3,7-dimethylocta-2,6-diene

A: 764-01-2
methyl propargyl alcohol

B: 16933-56-5
(6E)-7,11-dimethyldodeca-6,10-dien-2-yn-1-ol

Conditions

Conditions	Yield
Stage #1: 1,2-propanediene With n-butyllithium In diethyl ether; hexane at -78 - -15℃; for 1.75h; Inert atmosphere; Stage #2: 1-chloro-3,7-dimethylocta-2,6-diene In diethyl ether; hexane at -15℃; for 5.05h; Inert atmosphere; Stage #3: formaldehyd Further stages;	A n/a B 68%

: 50-00-0
formaldehyd

: 16466-97-0, 13254-27-8
1-propynylmagnesium bromide

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With diethyl ether

: 37428-46-9
(Z)-3-chloro-2-but-en-1-ol

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With potassium hydroxide
With potassium hydroxide
With sodium hydroxide

: 4089-67-2
2,3-dichloro-1-butanol

: 764-01-2
methyl propargyl alcohol

Conditions

Conditions	Yield
With ammonia; sodium amide

2-BUTYN-1-OL Chemical Properties

The Molecular formula of 2-BUTYN-1-OL(764-01-2): C₄H₆O
The Molecular Weight of 2-BUTYN-1-OL(764-01-2):70.09
The Molecular Structure of 2-BUTYN-1-OL(764-01-2):

EINECS: 212-113-4
Melting point: -2.2 ^°C(lit.)
Boiling Point: 148 °C at 760 mmHg
Flash Point: 51.7 °C
Index of Refraction: 1.446
Molar Refractivity: 20.12 cm³
Molar Volume: 75.3 cm³
Polarizability: 7.97 10^-24 cm³
Surface Tension: 37.2 dyne/cm
Density: 0.929 g/cm³
Enthalpy of Vaporization: 44.84 kJ/mol
Vapour Pressure: 1.67 mmHg at 25°C
storage temp.: Refrigerator
Stability: Stable. Flammable.
Appearance: liquid
BRN: 1733676
IUPAC Name: but-2-yn-1-ol
Synonyms: 2-butyn-1-0l;2-Butynol;HYDROXYMETHYLMETHYLACETYLENE;CH₃CequivCCH₂OH;BUT-2-IN-1-OL;2-BUTYNE-1-OL;2-Butynyl alcohol;But-2-yn-1-ol;

2-BUTYN-1-OL Safety Profile

The Hazard Codes of 2-BUTYN-1-OL(764-01-2):

Xi,

F
Hazard Note: Irritant
HazardClass: 3
The Risk Statements information of 2-BUTYN-1-OL(764-01-2):
10: Flammable
43: May cause sensitization by skin contact
36/37/38: Irritating to eyes, respiratory system and skin
52/53: Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment
The Safety Statements information of 2-BUTYN-1-OL(764-01-2):
16: Keep away from sources of ignition - No smoking
26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36/37: Wear suitable protective clothing and gloves
RIDADR: UN 1987 3/PG 3
WGK Germany: 3
PackingGroup: III
HS Code: 29052990

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