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DL-Tryptophan

5月 13th, 2024 News

DL-Tryptophan structural formula

Structural formula

Business number 0167
Molecular formula C11H12N2O2
Molecular weight 204.23
label

DL-?-(3-indolyl)-?-aminopropionic acid,

Mixed Tryptophan,

DL-2-amino-3-indolyl-1-propionic acid,

DL-Aminoindolepropionic acid,

DL-trypsin amino acid,

(±)-2-Amino-3-(3-indoyl) propionic acid,

DL-3?-Indolylalanine,

amino acid additives,

amino acid drugs,

intermediates,

Biochemical reagents

Numbering system

CAS number:54-12-6

MDL number:MFCD00064339

EINECS number:200-194-9

RTECS number:YN6129200

BRN number:86199

PubChem number:24900128

Physical property data

1. Properties: White to yellow-white crystals or crystalline powder, odorless or slightly smelly, slightly sweet taste. The bitterness of the L-type and the sweetness of the D-type are similar to sucrose. Poor acid resistance and light resistance.

2. Density (g/mL, 25/4?): 1.362

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): 289~290

5. Boiling point (ºC, normal pressure): Undetermined

6. Boiling point (ºC, 5.2kPa): Undetermined Determined

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): Undetermined

12. Saturation Vapor pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) partition coefficient: Undetermined

17. Explosion upper limit (% , V/V): Undetermined

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: Soluble in water (solubility 0.4 at 25°C %), dilute acids and bases, slightly soluble in ethanol

Toxicological data

1. Acute toxicity: mouse abdominal LC50: >1 mg/kg

2. Carcinogenicity: rat oral TDLo: 844mg/kg/92W-C

Ecological data

None

Molecular structure data

1. Molar refractive index: 57.76

2. Molar volume (cm3/mol): 149.8

3. Isotonic specific volume (90.2K ): 435.3

4. Surface tension (dyne/cm): 71.1

5. Polarizability (10-24cm3): 22.90 p>

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): -1.1

2. Number of hydrogen bond donors: 3

3. Number of hydrogen bond acceptors: 3

p>

4. Number of rotatable chemical bonds: 3

5. Number of tautomers:

6. Topological molecular polar surface area (TPSA): 79.1

p>

7. Number of heavy atoms: 15

8. Surface charge: 0

9. Complexity: 245

10. Number of isotope atoms : 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 1

13. Determine the chemical bond configuration Number of centers: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

1. Found in tobacco leaves.

Storage method

This product should be sealed and stored away from light.

Synthesis method

1. Indole is condensed to form pyridamine (3-dimethylaminomethylindole), which is further condensed to form ?-carboxylic acid ethyl ester-?(3-indole)-N-acetyl-?- Alanine ethyl ester undergoes hydrolysis, decarboxylation, and rehydrolysis to generate DL-tryptophan.

2.Using indole as raw material, tryptophan is produced under enzyme catalysis in a high-concentration pyruvate and ammonia atmosphere. Or from indole and acetamidomalonate ethylene glycol.

3.

Purpose

1. Nutritional and biochemical research. Prepare tissue culture medium. Nutritional supplements and antioxidants can be added to foods with low tryptophan content such as gelatin and corn. Combined with lysine, methionine and threonine in beef, rice, corn, etc., the best results can be obtained. L-tryptophan is obtained by optical refraction of DL-tryptophan, which is an important component of amino acid infusions and comprehensive amino acid preparations, and can treat niacin deficiency. As a feed additive, it participates in the renewal of plasma proteins in animals, promotes the function of riboflavin, contributes to the synthesis of nicotinic acid and heme, can significantly increase antibodies in the fetuses of pregnant animals, and has a stimulating effect on dairy cows and sows during lactation. The role of milk. When livestock and poultry lack tryptophan, their growth stagnates, their weight decreases, their fat accumulation decreases, and their testicles atrophy. 2.Used as a feed nutritional fortifier, it can significantly increase the body antibodies of animal fetuses and promote the milk production of dairy cows and sows during the lactation period. When animals lack tryptophan, their growth stagnates, their weight decreases, and their fat accumulation decreases. It is mainly used in artificial milk for piglets, and a small amount is used in sows and laying hens. The general dosage is 0.02% to 0.05%.

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(S)-(-)-Nicotine

5月 13th, 2024 News

(S)-(-)-Nicotine structural formula

Structural formula

Business number 0166
Molecular formula C10H14N2
Molecular weight 162.23
label

1-Methyl-2-(3-pyridyl)pyrrolidine,

(S)-(-)-Nicotine,

nicotine,

(?)-1-Methyl-2-(3-pyridyl)pyrrolidine,

nicotine,

pesticides

Numbering system

CAS number:54-11-5

MDL number:MFCD00006369

EINECS number:200-193-3

RTECS number:QS5250000

BRN number:82109

PubChem number:24897663

Physical property data

1. Properties: The pure product is a colorless liquid, odorless 2. Density (g/mL, 25/4?): 1.0097

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): -80

5. Boiling point (ºC, normal pressure): 246-247oC

6. Boiling point (ºC, 5.2kPa) : Undetermined

7. Refractive index: (n22D) is 1.5282 8. Flash point (ºC): 101

9. Specific rotation (º C=1, DIOXANE): -159.0 ~ -170.0

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): 0.13kPa/61.8?

12. Saturated vapor pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) partition coefficient: Undetermined

17. Explosion upper limit ( %, V/V): Undetermined

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: with water below 60°C Miscible and easily soluble in alcohol, ether, chloroform and petroleum ether.

Toxicological data

None

Ecological data

None

Molecular structure data

1. Molar refractive index: 49.25

2. Molar volume (cm3/mol): 157.1

3. Isotonic specific volume (90.2K ): 394.2

4. Surface tension (dyne/cm): 39.6

5. Polarizability (10-24cm3): 19.52 p>

Compute chemical data

1. Hydrophobic parameter calculation reference value (XlogP): 1.2

2. Hydrogen bondingNumber of donors: 0

3. Number of hydrogen bond acceptors: 2

4. Number of rotatable chemical bonds: 1

5. Tautomers Number:

6. Topological molecular polar surface area (TPSA): 16.1

7. Number of heavy atoms: 12

8. Surface charge: 0

p>

9. Complexity: 147

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 1

12 , The number of uncertain atomic stereocenters: 0

13. The number of determined chemical bond stereocenters: 0

14. The number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

Nicotine is a nitrogen-containing alkaline substance that easily reacts with hydrochloric acid to form nicotine hydrochloride, which is soluble in water. Nicotine can be freed by adding strong base NaOH to the extraction solution. Free nicotine has a certain vapor pressure (about 1333Pa) at around 100°C. Therefore, it can be separated and extracted by steam distillation. Nicotine is alkaline and can turn red litmus paper blue and phenolphthalein reagent red. It can be oxidized by KMnO4 solution to generate nicotinic acid, which reacts with alkaloid reagents to produce precipitation.

Storage method

Sealed packaging in brown glass bottles and stored in a dry, ventilated and cool place. Do not store with food or feed. Keep away from children.

Synthesis method

1. There are three industrialized preparation methods for nicotine: distillation, ion exchange resin and extraction. The basic production process is as follows:

The distillation method is to add alkali liquid to tobacco leaves, and then pass superheated steam for distillation. The distilled water contains free nicotine. The ion exchange method is to directly soak tobacco leaves in clean water, filter it to obtain a nicotine aqueous solution, and then flow the aqueous solution through an ion exchange resin column (strongly acidic). The nicotine is enriched on the ion exchange column, and then exchanged with alkali. Obtain an aqueous solution of free nicotine. The extraction method uses lime milk to directly neutralize the nicotine organic acid aqueous solution obtained by soaking tobacco leaves in clean water. The filtered clear liquid is the free nicotine aqueous solution. The nicotine solution obtained by the above method is first extracted with an organic solvent, and then the organic phase is back-extracted with about 30% sulfuric acid aqueous solution. The obtained nicotine sulfate aqueous solution is concentrated to obtain 40% nicotine sulfate. After neutralizing with alkali, excess water is evaporated under normal pressure, and the residue is distilled under reduced pressure to obtain nicotine with a purity of >95%.

2.Nicotine is a major alkaloid in tobacco and has been found in Nicotiana plants of the Solanaceae family. “font-family:Arial;”>The main varieties are Nicotiana tabacum and Nicotiana rustica.
1? Made from tobacco – dilute acid impregnation – alkali neutralization – steam distillation – oxalic acid treatment – alkalization.
2? Tobacco leaves – grinding (or using by-product tobacco powder from the cigarette factory) – lime milk alkalization – kerosene filtration.

Purpose

1. This product is a non-residue, non-systemic contact insecticide and has some ovicide activity. Used on rice, fruit trees, and vegetables to control rice miners, rice planthoppers, aphids, leaf rollers, cabbage caterpillars, etc. It can also be used for fumigation of confined spaces (greenhouses, etc.). Using nicotine as a lead compound can also produce new high-efficiency pesticides.

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2-acetylaminofluorene

5月 13th, 2024 News

2-acetylaminofluorene structural formula

Structural formula

Business number 0165
Molecular formula C15H13NO
Molecular weight 223.27
label

2-Acetamidofluoride,

N-(2-fluorenyl)acetamide,

2-AAF,

2-Acetamidofluorene,

N-Acetyl-2-aminofluorene,

N-(2-Fluorenyl)acetamide,

N-Fluoren-2-ylaccetamide

Numbering system

CAS number:53-96-3

MDL number:MFCD00001116

EINECS number:200-188-6

RTECS number:AB9450000

BRN number:2807677

PubChem number:24891166

Physical property data

1. Properties: light yellow crystalline powder.

2. Density (g/mL, 25/4?): Undetermined

3. Relative vapor density (g/mL, air=1): Undetermined

4. Melting point (ºC): 194

5. Boiling point (ºC, normal pressure): Undetermined

6. Boiling point (ºC, 5.2kPa): Undetermined

7. Refractive index: Undetermined

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

10. Autoignition point or ignition temperature (ºC): Undetermined

11. Vapor pressure (kPa, 25ºC): Undetermined

12. Saturated vapor Pressure (kPa, 60ºC): Undetermined

13. Heat of combustion (KJ/mol): Undetermined

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) partition coefficient: Undetermined

17. Explosion upper limit (%, V/V): Undetermined

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: Soluble in ethanol, ethylene glycol and fatty solvents, Insoluble in water.

Toxicological data

The median lethal dose (mice, oral) is 1020 mg/kg. Possibly carcinogenic.

Ecological data

None

Molecular structure data

1. Molar refractive index: 68.06

2. Molar volume (cm3/mol): 181.4

3. Isotonic specific volume (90.2K ): 490.5

4. Surface tension (dyne/cm): 53.4

5. Polarizability (10-24cm3): 26.98 p>

Compute chemical data

1. Reference value for hydrophobic parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 1

3. Number of hydrogen bond acceptors: 1

4. Number of rotatable chemical bonds: 1

5. Number of tautomers: 3

6. Topological molecule polar surface area 29.1

7. Number of heavy atoms: 17

8. Surface charge: 0

9. Complexity: 301

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain number of atomic stereocenters: 0

13. Determine the number of chemical bond stereocenters Number: 0

14. Number of uncertain chemical bond stereocenters: 0

15. Number of covalent bond units: 1

Properties and stability

1. Extremely toxic if inhaled or in contact with skin and may cause cancer. When using it in large quantities, you should wear appropriate protective clothing, gloves, and protective gear or a mask. If you have an accident or feel uncomfortable during use, you should ask a doctor for diagnosis and treatment, and you should get special guidance before use.

Storage method

Save in a cool, dry place and away from light.

Synthesis method

None

Purpose

1. Organic synthesis. Studies on the carcinogenicity and mutagenicity of aromatic amines.

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