Acetaldehyde (CAS # 75-07-0)

Chemical Property:

Molecular Formula	C2H4O
Molar Mass	44.05 Nws
Qhov ntom	0.785 g / mL ntawm 25 ° C (lit.)
Melting Point	-125 ° C (lit.)
Boling Point	21 ° C (lit.)
Flash Point	133 ° F
JECFA Number	80
Dej Solubility	> 500 g / L (20 ºC)
Solubility	cawv: soluble
Vapor Siab	52 hli Hg (37 ° C)
Vapor Density	1.03 (vs huab cua)
Qhov tshwm sim	daws
Specific Gravity	0.823 (20/4 ℃) (? 90% Soln.)
Xim	Dawb mus rau dawb
tsw	Pungent, fruity tsw pom ntawm 0.0068 txog 1000 ppm (lub ntsiab lus = 0.067 ppm)
Exposure Limit	TLV-TWA 180 mg/m3 (100 ppm) (ACGIH), 360 mg/m3 (200 ppm) (NIOSH); STEL 270 mg / m3 (150 ppm); IDLH 10,000 ppm.
Merck	14,39 ib
BRN	505984 ib
pKa	13.57 (ntawm 25 ℃)
PH	5 (10g / l, H2O, 20 ℃)
Kev cia khoom	2-8 ° C
Kev ruaj ntseg	Stable, tab sis huab cua rhiab heev. Cov khoom uas yuav tsum tau zam muaj xws li muaj zog oxidizing tus neeg sawv cev, muaj zog acids, txo cov neeg ua haujlwm, alkalies, halogens, halogen oxides. Cov nplaim taws heev. Vapour/air mixtures explosive
rhiab heev	Huab cua Sensitive
Explosive txwv	4-57% (V)
Refractive Index	N20/D 1.377
Physical thiab Chemical Properties	Tsis muaj xim, flammable, volatile, yooj yim ntws cov kua, ntsim thiab pungent tsw. melting point -123.5 ℃ Kub taw tes 20.16 ℃ txheeb ze ntom ntom 0.7780 Refractive Index 1.3311 flash point -38 ℃ Solubility hauv dej, ethanol, diethyl ether, benzene, roj av, toluene, xylene thiab acetone yog miscible.
Siv	Feem ntau yog siv rau kev npaj ntawm acetic acid, acetic anhydride, butyl aldehyde, octanol, pentaerythritol, triacetaldehyde thiab lwm yam tseem ceeb tshuaj raw cov ntaub ntawv

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Risk Codes	R23/24/25 – Toxic los ntawm inhalation, nyob rau hauv kev sib cuag nrog daim tawv nqaij thiab yog hais tias nqos. R34 - Ua rau kub hnyiab R40 - Cov pov thawj txwv ntawm cov nyhuv carcinogenic R43 - Tej zaum yuav ua rau mob ntawm daim tawv nqaij R36/37 - Kab mob rau qhov muag thiab ua pa. R12 - Flammable heev R67 - Vapors tuaj yeem ua rau qaug zog thiab kiv taub hau R11 - Cov nplaim hluav taws kub heev R41 - Riam phom loj rau qhov muag R22 - Ua phem yog tias nqos R10 - Flammable R19 - Tej zaum yuav tsim cov peroxides tawg
Kev nyab xeeb piav qhia	S36/37 - Hnav cov khaub ncaws tiv thaiv thiab hnab looj tes tsim nyog. S33 - Siv cov kev tiv thaiv kev tiv thaiv zoo li qub. S16 - Khaws kom deb ntawm qhov chaw hluav taws xob. S26 - Thaum sib cuag nrog lub qhov muag, yaug tam sim ntawd nrog dej txaus thiab nrhiav kev kho mob.
UN IDs	UN 1198 3/PG 3
WGK Germany	2
RTECS	ib 8925000
FLUKA BRAND F CODE	10
TSCA	Yog lawm
HS Code	29 12 00 Nws
Hazard Class	3
Packing Group	I
Toxicity	LD50 qhov ncauj hauv nas: 1930 mg / kg (Smyth)

Taw qhia

Acetaldehyde, tseem hu ua acetaldehyde lossis ethylaldehyde, yog cov organic compound. Cov hauv qab no yog kev qhia txog cov khoom, kev siv, kev npaj thiab cov ntaub ntawv kev nyab xeeb ntawm acetaldehyde:

Zoo:

1. Nws yog cov kua uas tsis muaj xim uas muaj ntxhiab tsw ntxhiab tsw.

2. Nws yog soluble nyob rau hauv dej, cawv thiab ether kuab tshuaj, thiab yuav volatile.

3. Nws muaj qhov nruab nrab polarity thiab tuaj yeem siv los ua cov kuab tshuaj zoo.

Siv:

1. Nws yog dav siv nyob rau hauv industrial ntau lawm.

2. Nws yog ib qho tseem ceeb raw khoom rau cov synthesis ntawm lwm cov tebchaw.

3. Nws tuaj yeem siv los tsim cov tshuaj xws li vinyl acetate thiab butyl acetate.

Txoj kev:

Muaj ntau ntau txoj hauv kev los npaj acetaldehyde, feem ntau yog ua los ntawm catalytic oxidation ntawm ethylene. Cov txheej txheem yog nqa tawm siv oxygen thiab hlau catalysts (xws li cobalt, iridium).

Cov ntaub ntawv kev nyab xeeb:

1. Nws yog ib qho tshuaj lom, uas ua rau khaus ntawm daim tawv nqaij, qhov muag, ua pa thiab digestive system.

2. Nws kuj yog cov kua hluav taws kub, uas tuaj yeem ua rau hluav taws kub thaum raug hluav taws kub los yog kub.

3. Kev ntsuas kev nyab xeeb tsim nyog yuav tsum tau ua thaum siv acetaldehyde, xws li hnav hnab looj tes tiv thaiv, tsom iav thiab lub tshuab ua pa, thiab xyuas kom meej tias nws ua haujlwm hauv qhov chaw muaj cua zoo.

Yav dhau los: 1-Nonal (CAS # 124-19-6)

Tom ntej: Heptaldehyde (CAS # 111-71-7)

Sau koj cov lus ntawm no thiab xa tuaj rau peb