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Cas Database |
| Name |
Dl-Alanine |
EINECS | 206-126-4 |
| CAS No. | 302-72-7 | Density | 1.161 g/cm3 |
| PSA | 63.32000 | LogP | 0.11850 |
| Solubility | 156 g/L (20 °C) in water | Melting Point |
289 °C (dec.)(lit.) |
| Formula | C3H7NO2 | Boiling Point | 212.907 °C at 760 mmHg |
| Molecular Weight | 89.0941 | Flash Point | 82.563 °C |
| Transport Information | N/A | Appearance | White crystalline powder |
| Safety | 22-24/25-36-26 | Risk Codes | 36/37/38 |
| Molecular Structure |
|
Hazard Symbols |
 Xi
|
| Synonyms |
(R,S)-Alanine;dl-.alpha.-Aminopropionic acid;DL-alpha-Alanine;D,L-Alanine;Alanin;DL-2-Aminopropanoic acid;(+-)-2-Aminopropionic acid;alanine;(RS)-2-Aminopropionsaeure;Alanine, DL-;(+-)-Alanine;DL-2-Aminopropionic acid;DL-.alpha.-Alanine;D, L-Alanine;DL-alpha-Aminopropionic acid;H-DL-Ala-OH;DL-2-Aminopropanic Acid,; |
Article Data | 259 |
Dl-Alanine Synthetic route
| Conditions | Yield |
|---|---|
| With salicylaldehyde In acetic acid at 100℃; for 1h; Product distribution; var. temp., var. catalysts, var. solvents; | 96% |
| salicylaldehyde In acetic acid at 100℃; for 1h; | 96% |
| With sodium dihydrogenphosphate; tritium oxide at 124.6 - 175.4℃; Thermodynamic data; Rate constant; various pH's, various temperatures; Ea, ΔH(excit.), ΔS(excit.); |
- 100-39-0
benzyl bromide
- 117470-83-4
ethyl N-<(4-chlorophenyl)methylene>-DL-alanate
A
- 1132-26-9
2-methyl-3-phenylalanine
B
- 302-72-7
rac-Ala-OH
| Conditions | Yield |
|---|---|
| With tetrabutylammomium bromide; potassium carbonate In acetonitrile for 48h; Product distribution; Heating; further alkylation method; | A 94% B 7% |
| Conditions | Yield |
|---|---|
| With phenylglycin In water; acetonitrile for 24h; Inert atmosphere; Reflux; | 90% |
| With ethylenediaminetetraacetic acid; cetyltrimethylammonium chloride; N-Phenylglycine; DPL at 30℃; Product distribution; potassium phosphate buffer (pH 7.8); variation of incubation time, pH and DPL concentration; | |
| With zinc(II) perchlorate; 15-aminomethyl-14-hydroxy-5,5-dimethyl-2,8-dithia<9>(2,5)pyridinophane In methanol at 23℃; Rate constant; |
| Conditions | Yield |
|---|---|
| With sodium dithionite; sodium carbonate In acetonitrile | 90% |
- 80222-96-4
2-aminopropanamide hydrochloride
- 302-72-7
rac-Ala-OH
| Conditions | Yield |
|---|---|
| Stage #1: 2-aminopropanamide hydrochloride With sodium hydroxide In water Stage #2: In water at 130℃; for 1h; | 88.6% |
| Conditions | Yield |
|---|---|
| With phenylglycin In water; acetonitrile for 24h; Inert atmosphere; Reflux; | 88% |
- 120-20-7
2-(3,4-dimethoxyphenyl)-ethylamine
- 4192-28-3
Phth-L-Ala-OH
A
- 26477-09-8
N-2-(3,4-dimethoxyphenyl)ethylphthalimide
B
- 302-72-7
rac-Ala-OH
| Conditions | Yield |
|---|---|
| In methanol at 140 - 145℃; for 0.666667h; Solvent; | A 78% B n/a |
| Conditions | Yield |
|---|---|
| Stage #1: sodium pyruvate With ammonia; hydrogen; chloro(1,5-cyclooctadiene)rhodium(I) dimer; 2,2'-bis[[bis(3-sulfophenyl)phosphino]methyl]-4,4',7,7'-tetrasulfo-1,1'-binaphthyl octasodium salt In water at 60℃; under 24752.5 Torr; for 16h; Stage #2: With hydrogenchloride In water Product distribution / selectivity; | 75% |
| With copper(II) perchlorate; 2-methyl-3-hydroxy-4-aminomethyl-5-(dodecylthiomethyl)pyridine In water at 30℃; | |
| Multistep reaction; | |
| With 2-methyl-3-hydroxy-4-aminomethyl-5-(N,N-didodecylamino)pyridine hydrobromide; N,N-hexadecyl-Nα-<6-(triethylammonio)hexanoyl>-L-alaninamide bromide; copper(II) perchlorate In water at 9.9℃; Thermodynamic data; Rate constant; Mechanism; pH = 6.9, (HEPES buffer), transamination; +ΔG, +ΔH (depends quant. of cat.), var. temp.; | |
| With copper(II) perchlorate; 2-methyl-3-hydroxy-4-aminomethyl-5-(dodecylthiomethyl)pyridine In water at 30℃; Rate constant; Mechanism; various vesicle-forming compound added; |
| Conditions | Yield |
|---|---|
| Stage #1: 2-Amino-1-propanol With (6-di-tert-butylphosphinomethyl-2,2’-bipyridyl)Ru(CO)HCl; water; sodium hydroxide In 1,4-dioxane for 24h; Schlenk technique; Inert atmosphere; Glovebox; Reflux; Stage #2: With hydrogenchloride In 1,4-dioxane; water | 71% |
| With potassium permanganate; sulfuric acid |
- 100-39-0
benzyl bromide
- 69555-16-4
ethyl 2-(diphenylmethyleneamino)propanoate
A
- 1132-26-9
2-methyl-3-phenylalanine
B
- 302-72-7
rac-Ala-OH
| Conditions | Yield |
|---|---|
| With tetrabutylammomium bromide; potassium carbonate In acetonitrile for 48h; Product distribution; Heating; further alkylation method; | A 23% B 63% |
Dl-Alanine Chemical Properties
IUPAC Name: 2-aminopropanoic acid
Synonyms of Dl-Alanine (CAS NO.302-72-7): (+-)-2-Aminopropionic acid ; (+-)-Alanine ; (R,S)-Alanine ; Alanine, DL- ; D,L-Alanine ; DL-2-Aminopropanoic acid ; DL-alpha-Aminopropionic acid
CAS NO: 302-72-7
Molecular Formula: C3H7NO2
Molecular Weight: 89.09
Molecular Structure: 
EINECS: 206-126-4
H bond acceptors: 3
H bond donors: 3
Freely Rotating Bonds: 2
Polar Surface Area: 29.54 Å2
Index of Refraction: 1.459
Molar Refractivity: 21 cm3
Molar Volume: 76.7 cm3
Surface Tension: 45.8 dyne/cm
Density: 1.161 g/cm3
Flash Point: 82.6 °C
Enthalpy of Vaporization: 49.5 kJ/mol
Boiling Point: 212.9 °C at 760 mmHg
Vapour Pressure: 0.0661 mmHg at 25°C
Melting Point: 289 °C (dec.)(lit.)
Storage temp: Store at RT.
Water Solubility: 156 g/L (20 °C)
Appearance: White crystalline powder
Stability: Stable. Incompatible with strong oxidizing agents.
Product Categories of Dl-Alanine (CAS NO.302-72-7): Amino Acids;Alanine [Ala, A];alpha-Amino Acids;Biochemistry;Amino Acids;alanine;amino acid;bio-chemical;chemicals;food additive;food additives;food flavor;organic acids;pharmaceutical intermediate;sweetener
Dl-Alanine Uses
Dl-Alanine (CAS NO.302-72-7) is a biologically important amino acid.
Dl-Alanine Production
D-Alanine occurs in bacterial cell walls and in some peptide antibiotics.
Here is Chemical Synthesis:
D-Alanine can be prepared by the condensation of acetaldehyde with ammonium chloride in the presence of sodium cyanide by the Strecker reaction, or by the ammonolysis of 2-bromopropionic acid
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Dl-Alanine Safety Profile
Safety Information about Dl-Alanine (CAS NO.302-72-7):
Hazard Codes: 
Xi
Risk Statements: 36/37/38
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 22-24/25-36-26
S22: Do not breathe dust.
S24/25: Avoid contact with skin and eyes.
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36: Wear suitable protective clothing.
WGK Germany: 3
RTECS: AY2980000
HS Code: 29224995
Low toxicity by ingestion. When heated to decomposition emits toxic fumes of NOx.
Dl-Alanine Specification
General Information: As in any fire, wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear.
Extinguishing Media: Use water spray, dry chemical, carbon dioxide, or chemical foam.
Handling: Avoid breathing dust, vapor, mist, or gas. Avoid contact with eyes, skin, and clothing.
Storage: Store in a cool, dry place. Store in a tightly closed container. Do not exceed 30°C (86°F).
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