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). |
Gunakake watesan |
FEMA (mg / kg): softdrinks 4.1; omben adhem 12; permen 41; panganan panggang 38; permen permen 470; margarin 30. |
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. |
Informasi Bahaya & Keamanan |
Cara produksi: Canbe acid Isobutyric asale saka oksidasi isobutanol. |
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 |