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97-67-6

Basic Information
CAS No.: 97-67-6
Name: L-(-)-Malic Acid
Article Data: 127
Molecular Structure:
Molecular Structure of 97-67-6 (L-(-)-Malic Acid)
Formula: C4H6O5
Molecular Weight: 134.089
Synonyms: (2S)-2-Hydroxybutanedioic acid;(-)-Hydroxysuccinic acid;(-)-Malic acid;Apple acid;Hydroxysuccinnic acid (-);Butanedioic acid, hydroxy-, (2S)-;(-)-L-Malic acid;S-2-Hydroxybutanedioic acid;L-Malate;Malic acid, L-;Butanedioic acid, hydroxy-, (S)- (9CI);L-Apple acid;L(-)-Malic acid;Malic Acid;L-Maleic Acid;Hydroxybutanedioic acid, (S)-;84781-39-5;(S)-Malic acid;(-)-1-Hydroxy-1,2-ethanedicarboxylic acid;S-(-)-Malic acid;L-(-)-Malic acid;L-2-Hydroxybutanedioic acid;2-Hydroxybutanedioic acid, (S)-;
EINECS: 202-601-5
Density: 1.641 g/cm3
Melting Point: 101-103 °C(lit.)
Boiling Point: 306.4 °C at 760 mmHg
Flash Point: 153.4 °C
Solubility: soluble in water
Appearance: clear colourless solution
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-36-37/39
PSA: 94.83000
LogP: -1.09340
Synthetic route
80513-23-1

(R)-4,4,4-trichloro-3-hydroxybutanoic acid

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
With sodium hydroxide Ambient temperature;90%
59025-03-5

(S)-acetoxysuccinic anhydride

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
With sodium hydroxide Ambient temperature;76%
514829-23-3

(2S,4S)-2-(tert-butyl)-5-oxo-1,3-dioxolane-4-acetic acid isopropyl ester

A

97-67-6

(S)-Malic acid

B

514829-25-5

(2S)-2-hydroxybutanedioic acid 4-isopropyl ester

Conditions
ConditionsYield
With hydrogenchloride; water In tetrahydrofuran Heating;A n/a
B 66%
110-17-8

(2E)-but-2-enedioic acid

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
With formaldehyd; TETRACYCLINE; paraquat dichloride In water at 37℃; for 4h; Clostridium formicoaceticum,phosphate buffer;52%
With phosphate buffer; hydrogen at 170℃; Rate constant; Thermodynamic data; enzymatic hydrolysis by fumarase, ΔS, ΔH, ΔG; also with absence of buffer;
With fumarase
16493-64-4

(S)-4,4,4-trichloro-3-hydroxybutanoic acid

A

97-67-6

(S)-Malic acid

B

110-17-8

(2E)-but-2-enedioic acid

Conditions
ConditionsYield
With sodium hydroxide In water at 20℃; for 24h;A 1.14 g
B 5%
71-23-8

propan-1-ol

56-84-8

L-Aspartic acid

A

97-67-6

(S)-Malic acid

B

110-17-8

(2E)-but-2-enedioic acid

Conditions
ConditionsYield
bei der Einw. von Bact.coli;
328-42-7

Oxalacetic acid

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
With fructose 1,6-bisphosphate trisodium; nicotinamide adenine dinucleotide red. form; R171W mutant In water at 25℃; Rate constant; other mutant enzyme;
With kidney enzyme
With homogenate from rat-tumors
64-17-5

ethanol

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
With penicillium-artene
With Aspergillus niger
3130-87-8

ASPARAGINE

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
bei der Einw. von Bac. pyocyaneus;
70-47-3

L-asparagine

97-67-6

(S)-Malic acid

Conditions
ConditionsYield
Bei der Einw. des Yoghurtferments;
durch das Yoghurtferment;
durch Hefe;
With cis-nitrous acid
With hydrogenchloride; sodium nitrite In water for 24h; Ambient temperature;100 % Spectr.
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    Product Name: L-(-)-Malic Acid Synonyms: (S)-(-)-HYDROXYSUCCINIC ACID;(S)-HYDROXYSUCCINIC ACID;(S)-HYDROXYBUTANEDIOIC ACID;(S)-(-)-MALIC ACID;(S)-2-HYDROXYBUTANEDICARBOXYLIC ACID;S(-)-2-HYDROXYSUCCINIC ACID

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Chemistry

Structure of L-Malic acid (CAS NO.97-67-6):

IUPAC Name: (2S)-2-hydroxybutanedioic acid 
Empirical Formula: C4H6O5
Molecular Weight: 134.0874 
EINECS: 202-601-5 
Index of Refraction: 1.529
Molar Refractivity: 25.2 cm3
Molar Volume: 81.6 cm3
Polarizability: 9.99×10-24cm3
Surface Tension: 86.2 dyne/cm
Density: 1.641 g/cm3
Flash Point: 153.4 °C
Enthalpy of Vaporization: 63.43 kJ/mol 
Melting Point: 101-103 °C(lit.)
Boiling Point: 306.4 °C at 760 mmHg
Vapour Pressure: 7.19E-05 mmHg at 25°C 
Solubility: H2O: 0.5 M at 20 °C, clear, colorless
Water Solubility: soluble 
Physical Appearance: clear colourless solution
Product Categories: Food & Feed ADDITIVES;MalicAcidSeries;Carboxylic Acids (Chiral);Chiral Building Blocks;for Resolution of Bases;Optical Resolution;Synthetic Organic Chemistry;Chiral chemicals 
Product Name: L(-)-Malic acid
Synonyms of L-Malic acid (CAS NO.97-67-6): (-)-Hydroxysuccinic acid ; (-)-Malic acid ; (2S)-2-Hydroxybutanedioic acid ; 2-Hydroxybutanedioic acid, (S)- ; Apple acid ; Butanedioic acid, hydroxy-, (S)- ; Hydroxybutanedioic acid, (S)- ; L-(-)-Malic acid ; Malic acid, L- ; S-(-)-Malic acid ; S-2-Hydroxybutanedioic acid .

History

 Malic acid was first isolated from apple juice by Carl Wilhelm Scheele in 1785. Antoine Lavoisier in 1787 proposed the name acide malique which is derived from the Latin word for apple, mālum.

Uses

 L-Malic acid (CAS NO.97-67-6) is an active ingredient in many sour or tart foods.

Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-37/39 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing. 
S37/39:Wear suitable gloves and eye/face protection.
WGK Germany: 3
RTECS: ON7175000
HS Code: 29181980

Specification

Storage
It should be stored in a tightly closed container and keep container closed when not in use. It should be stored in a cool and dry area away from incompatible substances.
Handling
Wash thoroughly after handling.Avoid contact with eyes, skin, and clothing. Remove contaminated clothing and wash before reuse. Wash clothing before reuse. Avoid ingestion and inhalation. Use with adequate ventilation.
Personal Protection
Wear appropriate protective chemical safety goggles or eyeglasses. Wear appropriate protective gloves to prevent skin exposure.Wear suitable protective clothing to prevent skin exposure.
Small spills/leaks
Clean up spills right away, using the suitable protective equipment. Sweep up, then place into a container for disposal. Avoid generating dusty conditions. Provide ventilation.