Email:[email protected]
Methyl Ethyl Ketone

Methyl Ethyl Ketone

CAS:78-93-3

Cyclohexanone

Cyclohexanone

CAS:108-94-1

Acetone

Acetone

CAS:67-64-1

Acetic Acid

Acetic Acid

CAS:64-19-7

Ethyl Acetate

Ethyl Acetate

CAS:141-78-6

Toluene

Toluene

CAS:108-88-3

Benzene

Benzene

CAS:71-43-2

Ethanol

Ethanol

CAS:64-17-5

Methanol

Methanol

CAS:67-56-1

Leave a Reply

Your Email address will not be published

Your Rating : Very Good!

temperatura fusione 2 butanone in Malaysia

Biological production of 2-butanone in Escherichia coli

Abstract. An Escherichia coli (E. coli) strain was engineered to synthesize 2-butanone from glucose by extending the 2,3-butanediol synthesis reaction sequence alyzed by exogenous enzymes. To convert 2,3-butanediol to 2-butanone, B12-dependent glycerol dehydratase from Klebsiella pneumoniae was introduced into E. coli.

2-BUTANONE - (Organic Method #84) - M. D. Campbell

Samples were generated by sampling from an atmosphere containing 2-butanone at 2 times the target concentration. Thirty-six storage samples were collected by sampling a dynamically generated atmosphere containing 1080 mg/m 3 or 400 ppm of 2-butanone and 77% relative humidity for 30 min at 0.05 L/min.

A prediction model using 2-propanol and 2-butanone in urine distinguishes breast cancer …

5/10/2021· The training set included 60 breast cancer patients (age 34-88 years, mean 60.3) and 60 healthy controls (age 34-81 years, mean 58.7). The external validation set included 50 breast cancer patients (age 35-85 years, mean 58.8) and 117 healthy controls (age 18

Butanone - Wikipedia

Butanone Butanone, also known as methyl ethyl ketone ( MEK ), [a] is an organic compound with the formula CH 3 C (O)CH 2 CH 3. This colourless liquid ketone has a sharp, sweet odor reminiscent of acetone. It is produced industrially on a large scale, but occurs in nature only in trace amounts. [7]

    Production· Appliions· Safety· See also· Notes· References
  • Toxicological Profile for 2-Butanone - Agency for Toxic …/cite>· PDF

    2-BUTANONE ii DISCLAIMER Use of trade names is for identifiion only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry, the Public Health Service, or the U.S. Department of Health and Human Services.

1988 OSHA PEL Project - 2-Butanone NIOSH CDC

28/9/2011· 2-BUTANONE. OSHA comments from the January 19, 1989 Final Rule on Air Contaminants Project extracted from 54FR2332 et. seq. This rule was remanded by the U.S. Circuit Court of Appeals and the limits are not currently in force. CAS: 78-93-3; Chemical Formula: CH 3 COCH 2 CH 3. OSHA’s former exposure limit for 2-butanone was 200 ppm TWA.

2-Butanone CAS#:78-93-3 Chemsrc

1/7/2022· CHEMICAL NAME : 2-Butanone CAS REGISTRY NUER : 78-93-3 LAST UPDATED : 199712 DATA ITEMS CITED : 64 MOLECULAR FORMULA : C4-H8-O MOLECULAR WEIGHT : 72.12 WISWESSER LINE NOTATION : 2V1 HEALTH HAZARD DATA ACUTE TOXICITY DATA TYPE OF TEST : Standard Draize test ROUTE OF EXPOSURE : …

2-Butanone Structure - C4H8O - Over 100 million chemical compounds - Mol-Instincts

The 2-Butanone molecule contains a total of 12 bond (s) There are 4 non-H bond (s), 1 multiple bond (s), 1 rotatable bond (s), 1 double bond (s) and 1 ketone (s) (aliphatic). Images of the chemical structure of 2-Butanone are given below: 2-dimensional (2D) chemical structure image of …

A prediction model using 2-propanol and 2-butanone in urine distinguishes breast cancer …

5/10/2021· The box plots of the peak areas of 2-butanone and 2-propanol generated by the constructed model are shown in Fig. 4. The AUC was 0.9228, sensitivity was 84%, specificity was 90.5%, positive predictive value was 79.2%, negative predictive value was 92.9%, and accuracy was 88.6% (Fig. 5 and Tables 5, 6 ). Figure 4.

2-Butanone synthesis - Big Chemical Encyclopedia

StereochemicaHy pure (185) is synthesized from (2R)-l,2-0-isopropyhdene-3-butanone in an overall yield of 86% in four chemical steps. Heating a toluene solution of (185), enol ether (187), and 2,6-dimethylphenol to 180°C in a sealed tube for 60 …

CA2565675C - Process for the preparation of 2-butanol - Google

The 2-butanone/S-2-butanol mixture was first obtained from the heptanol phase (boiling point approx. 158-161 C) via distillation prior to the separation of 2-butanone (boiling point 80 C)

2 Butanone - an overview ScienceDirect Topics

Glucoside resin (49 mg, 0.025 mmol) was suspended in 2 mL of 2-butanone. NaI (500 mg, 3.31 mmol) was added, and the mixture was heated to 65°C and stirred overnight (20 h). The cooled resin was collected on a coarse-fritted funnel and washed (2 × 10 mL each) with H 2 O, THF/H 2 O (2:1), H 2 O, H 2 O, THF/H 2 O (2:1), and THF.

2-Butanone - SpectraBase

2-Butanone Compound with free spectra: 127 NMR, 19 FTIR, 3 Raman, 2 Near IR, and 35 MS Spectra Synonyms Other Similar Compounds Literature 13C NMR 117 1H NMR 3 17O NMR 7 ATR-IR 5 Transmission IR 10 Vapor Phase IR 4 Near IR 2 Raman 3 MS 35

2-Butanone%2fzh-tw%2f%25E4%25B8%2581%25E9%2585%25AE&TierName=webfluid">

:

Malaysia

:

Malaysia
  • Biological production of 2-butanone in Escherichia coli/cite>

    To convert 2,3-butanediol to 2-butanone, B12-dependent glycerol dehydratase from Klebsiella pneumoniae was introduced into E. coli. It has been proposed that the enzyme has a weak …

    :

    Malaysia

    :

    Malaysia
  • La temperatura di fusione e di ebollizione di vari metalli/cite>

    6/3/2017· La temperatura di fusione e di ebollizione di vari metalli. Nella seguente tabella sono eleni i punti di fusione e di ebollizione di quarantotto tra metalli e altri elementi chimici. Gli …

    :

    Malaysia

    :

    Malaysia
  • A prediction model using 2-propanol and 2-butanone in urine …/cite>

    5/10/2021· The training set included 60 breast cancer patients (age 34-88 years, mean 60.3) and 60 healthy controls (age 34-81 years, mean 58.7). The external validation set included 50 …

    :

    Malaysia

    :

    Malaysia
  • Malaysia climate: average weather, temperature, precipitation, …/cite>

    The temperature reached 37 C (98.5 F) in March 2019, April 1998 and April 2016. At night, it never gets cold. Although in February 1977 the temperature dropped to 18 C (64.5 F), after 2000 it …

    Butanone - Wikipedia

    Butanone, also known as methyl ethyl ketone ( MEK ), [a] is an organic compound with the formula CH 3 C (O)CH 2 CH 3. This colourless liquid ketone has a sharp, sweet odor reminiscent of acetone. It is produced industrially on a large scale, but occurs in nature only in trace amounts. [7] It is partially soluble in water, and is commonly used

      Production· Appliions· Safety· See also· Notes· References
    • 1988 OSHA PEL Project - 2-Butanone NIOSH CDC/cite>

      28/9/2011· CAS: 78-93-3; Chemical Formula: CH 3 COCH 2 CH 3 OSHA’s former exposure limit for 2-butanone was 200 ppm TWA. OSHA proposed to supplement this limit with a STEL of 300 ppm, based on the ACGIH (1986/Ex. 1-3) recommendation. NIOSH (Ex. 8-47, Table N1) concurred with this proposal.

      2-Butanone - NIST

      2-Butanone. Formula: C 4 H 8 O. Molecular weight: 72.1057. IUPAC Standard InChI: InChI=1S/C4H8O/c1-3-4 (2)5/h3H2,1-2H3. Copy Sheet of paper on top of another sheet. IUPAC Standard InChIKey: ZWEHNKRNPOVVGH-UHFFFAOYSA-N. …

      2-Butanone - NIST

      2-Butanone. Formula: C 4 H 8 O. Molecular weight: 72.1057. IUPAC Standard InChI: InChI=1S/C4H8O/c1-3-4 (2)5/h3H2,1-2H3. Copy Sheet of paper on top of another sheet. IUPAC Standard InChIKey: ZWEHNKRNPOVVGH-UHFFFAOYSA-N. …

      2 Butanone PDF Acetic Acid alysis - Scribd

      2-Butanone is produced by ARCO (US), Heat of fusion, J/mol 7456 AKZO (NL), Biochimica (ES), BP (GB), Car- Heat of vaporization at 79.6 C, J/mol 31.2 Coustion enthalpy at constant bochlor (Argent.), Celanese (US, CA, Mexico), pressure, 25 C, kJ/mol 2444.3 Esso (GB, US), Maruzen (JP), PCUK (FR), Thermal conductivity, W m−1 K−1

      A prediction model using 2-propanol and 2-butanone in urine distinguishes breast cancer …

      5/10/2021· The prediction model built through this procedure used two VOCs in coination, 2-propanol and 2-butanone. As the box plots generated by this model show, 2-butanone was higher in BCP than in HC, while 2-propanol was higher in HC than in BCP (Fig. 2 ). The obtained discriminant equation was used as the discriminant model equation.

      Toxicological Profile for 2-Butanone - Agency for Toxic …

      2-BUTANONE ii DISCLAIMER Use of trade names is for identifiion only and does not imply endorsement by the Agency for Toxic Substances and Disease Registry, the Public Health Service, or the U.S. Department of Health and Human Services.

      2-Butanone (CAS 78-93-3) - Chemical & Physical Properties by …

      Densities and Viscosities for Binary and Ternary Mixtures of Ethanol, 2-Butanone, and 2,2,4-Trimethylpentane at T = (298.15, 308.15, and 318.15) K Measurement of Isobaric Vapor - Liquid Equilibria of Dimethyl Carbonate with Acetone, 2-Butanone and 2-Pentanone at 101.3 kPa and Density and Speed of Sound at 298.15 K

      2-Butanone - CheK

      1/1/2022· 2-Butanone - Nature colorless transparent volatile liquid, acetone odor. Melting Point -85.9 ℃; Boiling point 79,6 ℃;30 ℃ (15. 9kPa), relative density 0.8054 (20/4 ℃); Refractive index 1. 3788} flash point (Open Cup)-6 ℃; Spontaneous ignition point 515.6 ℃; Specific heat capacity 2.297kj/ (kg. C), viscosity (20 C) 0.41mPa-s.

      2‐Butanone [MAK Value Documentation, 1999] - Major Reference …

      31/1/2012· In an inadequately documented study, slight irritation of the nose and throat was reported in 10 persons exposed to a 2‐butanone concentration of 100 ml/m 3 for 3–5 minutes. At 200 ml/m 3 there was slight eye irritation. Exposure to the concentration of 200 ml/m 3 for 8 working hours was considered to be tolerable by the 10 test persons.

      2-Butanone Structure - C4H8O - Over 100 million chemical compounds - Mol-Instincts

      The 2-Butanone molecule contains a total of 12 bond (s) There are 4 non-H bond (s), 1 multiple bond (s), 1 rotatable bond (s), 1 double bond (s) and 1 ketone (s) (aliphatic). Images of the chemical structure of 2-Butanone are given below: 2-dimensional (2D) chemical structure image of …

      A prediction model using 2-propanol and 2-butanone in urine distinguishes breast cancer Scientific Reports

      5/10/2021· The prediction model built through this procedure used two VOCs in coination, 2-propanol and 2-butanone. As the box plots generated by this model show, 2-butanone was higher in BCP than

      2-Butanone (CAS 78-93-3) - Chemical & Physical Properties by …

      Densities and Viscosities for Binary and Ternary Mixtures of Ethanol, 2-Butanone, and 2,2,4-Trimethylpentane at T = (298.15, 308.15, and 318.15) K Measurement of Isobaric Vapor - Liquid Equilibria of Dimethyl Carbonate with Acetone, 2-Butanone and 2-Pentanone at 101.3 kPa and Density and Speed of Sound at 298.15 K

      2-Butanone ToxFAQs™ ATSDR - Centers for Disease Control …

      2-Butanone is an industrial chemical. 2-Butanone is also called methyl ethyl ketone. It can also be present in the environment from natural sources. It is made by some trees and found naturally in some fruits and vegetables in small amounts. 2-Butanone is used in a nuer of industrial products such as paints and other coatings.

      2‐Butanone [MAK Value Documentation, 1999] - Major Reference …

      31/1/2012· In an inadequately documented study, slight irritation of the nose and throat was reported in 10 persons exposed to a 2‐butanone concentration of 100 ml/m 3 for 3–5 minutes. At 200 ml/m 3 there was slight eye irritation. Exposure to the concentration of 200 ml/m 3 for 8 working hours was considered to be tolerable by the 10 test persons.

      Temperatura di fusione di un metallo - Air Liquide

      Temperatura di fusione dei principali materiali allo stato puro Punto di fusione dei diversi metalli utilizzati nella grande industria A titolo indiivo, la temperatura di fusione degli acciai è circa 1400-1500 °C a seconda della loro composizione e quella della ghisa è …

      Relazione tra temperatura fusione di una sostanza e legami intra …

      Lezione di chimica in cui vengono utilizzati i "legami intermolecolari" (deboli forze di dispersione di London, legami dipolo-dipolo, legami idrogeno) e i "l

  • Guan di miao, Yulong town

    XingYang, Henan, China

    7*24 Hours 365 Days