Asam Isobutyric

Jeneng Produk:

Asam Isobutyric

CAS:

79-31-2

MF:

C4H8O2

MW:

88.11

EINECS:

201-195-7

File Mol:

79-31-2.mol

Titik lebur

-47 ° C

Titik didih

153-154 ° C (surem)

kapadhetan

0,95 g / mL ing suhu 25 ° C (lit.)

kerapatan uap

3.04 (vs hawa)

tekanan uap

1,5 mm Hg (20 ° C)

indeks bias

n20 / D 1.393 (lit.)

FEMA

2222 | Asam ISOBUTIKAL

Fp

132 ° F

temp panyimpenan

ruangan temp

kelarutan

618g / l

pka

4,84 (jam 20â „ƒ)

wujud

Cairan

warna

Cetha tanpa warna

PH

2.3 (500g / l, H2O, 25â "ƒ)

Ambang ambu ora enak

0,0015ppm

watesan bledosan

1,6-7,3% (V)

Kelarutan Banyu

210 g / L (20 ºC)

Nomer JECFA

253

Merck

14.5155

BRN

635770

InChIKey

KQNPFQTWMSNSAP-UHFFFAOYSA-N

Referensi CAS DataBase

79-31-2 (Referensi CAS DataBase)

Referensi Kimia NIST

Asam propanoat, 2-metil- (79-31-2)

Sistem Registrasi Bahan EPA

Isobutyricacid (79-31-2)

Kode Bahaya

Xn

Pernyataan Risiko

21/22

Pernyataan Keamanan

23-36 / 37 / 39-24 / 25

RIDADR

UN 2529 3 / PG 3

WGK Jerman

1

RTECS

NQ4375000

F

13

Suhu Otomatis

824 ° F

TSCA

Nggih

HazardClass

3

PackingGroup

III

Kode HS

29156000

Data Zat Mbebayani

79-31-2 (Data Zat Mbebayani)

Keracunan

LD50 kanthi lisan ing Rabbit: 266 mg / kg LD50 dermal Kelinci 475 mg / kg

Bahan kimia

Berminyak tanpa warna; ambu ora enak sing kuwat; miscible karo banyu; larut ing alkohol, eter lan sapanunggalane.

Analisis isi

Ditemtokake kanthi metode analisis konten sing padha karo "asam butyric (03454)".

Keracunan

GRAS (FEMA).
LD50 280 mg / kg (tikus, lisan).

Gunakake watesan

FEMA (mg / kg): softdrinks 4.1; omben adhem 12; permen 41; panganan panggang 38; permen permen 470; margarin 30.
Panggunaan moderat minangka watesan (FDA § 172.515, 2000).

Cara produksi

Preparasi asam isobutyric padha karo asam butyric, sing ditindakake kanthi oksidasi langsung isobutyl alkohol lan isobutyraldehida. Asam Isobutyric bisa digawe langsung saka oksidasi isobutyraldehida ing orooksigen udara. Cara manufaktur liyane duwe hidrolisis isobutyronitrile lan hidrogenasi asam metacrylic. Oksidasi 2-metil-1-nitropropane kanggo asam prepisobutyric uga bisa ngasilake asil sing luwih dhuwur. Pemurnian asam Isobutyric bisa diwujudake kanthi distilasi azeotropic karo banyu, asam isobutyric andanhydrous bisa dipikolehi kanthi distilasi ekstraksi saka karbonat tetrachloride. Propilena lan asam ester formic bisa reaksi ing 50 ° C kanthi katalisis asam hidrofluorat kanggo ngasilake metil isobutyrate lan propylisobutyrate.
Aplikasi: Asam Isobutyric ora luwih penting tinimbang asam butyric, nanging nyepetake panggunaan sing padha karo asam n-butyric. Asam Isobutyric umume digunakake kanggo ngasilake ester sing cocog, kayata methyl isobutyrate karo apricotincense, propyl isobutyrate kanthi rasa nanas, isobutyl isobutyrate withbanana rasa, octyl isobutyrate kanthi rasa grapes, benzyl isobutyrate karo ambu jasmine, lsp. Bisa digunakake kanggo nyiyapake rasa lan aroma lan uga digunakake ing Pabrik pernis lan plastik. Asam Isobutyric duwe sawetara turunan penting sing, ing industri, digunakake kanggo produksi penengah isobutyronitrile, lan banjur diowahi dadi tooboblamlamin hidroklorida sing dadi bahan baku pestisidazinon.

Informasi Bahaya & Keamanan

Cara produksi: Canbe acid Isobutyric asale saka oksidasi isobutanol.
Kategori: Cairan sing bisa dibakar
Klasifikasi toksisitas: keracunan dhuwur
Keracunan Akut: LD-Tikus Lisan: 280 mg / kg
Karakteristik bebaya gampang murub: Gabungan nalika geni, suhu dhuwur lan oksidan sing kuwat; Ngeculake asap iritasi nalika ngobong.
Karakteristik panyimpenan lan transportasi: Komplit paket; ngemot lan mbongkar cahya; ventilasi gudang; adoh saka geni lan suhu dhuwur; disimpen kanthi oksidan lan alkali.
Agen pemadam kebakaran: busa, bubuk garing, karbondioksida, pasir

Katrangan

Asam asam Isobutyric hasan lan rasa sing padha karo asam n-butyric. Disiapake liwat alkohol oksidasi isobutil.

Properti Kimia

Asam Isobutyric hasstrong nembus ambune butter rancid. Bau lan rasane padha karo asam ton-butyric.

Properti Kimia

tanpa warna sing jelas

Migunakake

Asam Isobutyric minangka agen aflavoring sing cairan tanpa warna kanthi ambu sing kuat, nembus, padha karo butter. iku ora bisa dienggo ing alkohol, propilen glikol, gliserin, minyak mineral, lan minyak sing paling akeh lan solle ing banyu. iku dipikolehi sintesis biokimia. iki uga diarani asam isopropilformat.

Migunakake

Pabrik ramuan kanggo pelarut, rasa lan basis minyak wangi, agen disinfektan, varnis, kulit empuk, agen penyamakan.

Definisi

ChEBI: Asam branchedfatty sing ngemot asam propanoat sing nggawa cabang metil ing C-2.

Preparasi

Kanthi oksidasi alkohol ofisobutyl.

Nilai ambang ambu

Deteksi: 10 ppb to9.5 ppm; karakteristik aroma ing 10 ppm: asam asam, buttery susu andcheesy kanthi dhasar woh.

Nilai ambang rasa

Karakteristik ing 15 ppm: asam, susu sing asem, krim, keju, dairynuance budaya.

Katrangan Umum

Cairan tanpa warna kanthi ambu ora enak saka butter rancid. Titik flash 132 ° F. Kapadhetan 7,9 pon / gal. Serap kanggo logam lan jaringan.

Reaksi Udhara & Banyu

Flammable Watersoluble

Profil Reaktivitas

Isobutyric acidcorrodes aluminium lan logam liyane. Gas hidrogen mudah terbakar bisa nglumpukake papan sing ora ditutup nalika reaksi kasebut kedadeyan [USCG, 1999].

Bahaya

Beracun amarga asupan, iritasi jaringan sing kuat.

Bahaya Kesehatan

Penyedhot nyebabake iritasi lan tenggorokan. Ingestasi nyebabake gangguan ing tutuk lan weteng. Kontak karo mripat utawa kulit nyebabake iritasi.

Bebaya Api

Flammable / combustiblematerial. Bisa uga diobong dening panas, geni utawa geni. Uap bisa uga mbentuk campuran explosive karo hawa. Uap bisa uga menyang sumber kobongan lan lampu kilat maneh. Umume uap luwih abot tinimbang hawa. Dheweke bakal nyebar ing sadawane lemah lan nglumpukake ing wilayah sing kurang utawa dibuwang (got, ruang paling ngisor, tank). Bahan bakar bledosan uap, njobo utawa ing got. Runoff to sewer bisa nggawe geni utawa bledosan. Wadah bisa njeblug nalika dipanas. Akeh cairan sing luwih entheng tinimbang banyu.

Metode Pemurnian

Distil asam saka KMnO4, banjur redistil saka P2O5. [Beilstein 2 H 288, 2 I 126, 2 II 257, 2III 637, 2 IV 843.]

Produk Preparasi

Permethrin -> Gemfibrozil -> C laptopril -> Isobutyryl chloride -> Isobutyric anhydride -> Ethofenprox -> etil 3,3-dimethylpent-4-en-1-oate -> 4- (3-ISOPROPYL- 1,2,4-OXADIAZOL-5-YL) PIPERIDINE -> Methyl isobutyrate -> tert-Butyl peroxypivalate -> etil4,6,6-trichloro-3,3-dimethyl-hex-5-enoate -> Isobutyramide -> Benzyl isobutyrate -> Isobutyl formate -> 2- (4-Ethoxyphenyl) -2-methylpropanol -> Ethyl isobutyrate -> CITRONELLYL ISOBUTYRATE -> 2-Bromo-2-methylpropionyl bromide -> Ethyl2 - (2-aminothiazole-4-yl) -2- (1-tert-butoxycarbonyl-1-methylethoxyimino) asetat -> Phenoxyethyl isobutyrate -> Butyl isobutyrate -> P-TOLYL ISOBUTYRATE -> Phenethyl isobutyrate -> ISCTUSLAT OCTYL -> ISPTUTRASI HEPTYL -> CINNAMYL ISOBUTYRATE -> Etil 2-bromoisobutyrate -> Hexyl isobutyrate

Bahan baku

Tetrachloride karbon -> Hydrazinium hidroksida -> Asam hidrofluorik -> 2-Methyl-1-propanol -> (3R, 4S) -1-Benzoyl-3- (1-methoxy-1-methylethoxy) -4-fenil -2-azetidinone -> asam Methacrylic -> Isobutyraldehyde -> (-) - MENTHYL CHLOROFORMATE -> Isobutyronitrile -> Diazinon -> Propyl gallate -> 1-Nitropropane -> BUTYRAMIDINE -> Methyl isobutyrate -> AROMA -> Isopentyl isobutyrate -> Benzyl isobutyrate -> OCTYL ISOBUTYRATE