Product Name

  • Name

    Tributyl citrate

  • EINECS 201-071-2
  • CAS No. 77-94-1
  • Article Data29
  • CAS DataBase
  • Density 1.041 g/cm3
  • Solubility insoluble in water
  • Melting Point ≥300 °C(lit.)
  • Formula C18H32O7
  • Boiling Point 389.8 °C at 760 mmHg
  • Molecular Weight 360.448
  • Flash Point 120.7 °C
  • Transport Information UN 2811 6.1/PG 2
  • Appearance clear liquid
  • Safety 26-36/37/39-45-24/25
  • Risk Codes 25
  • Molecular Structure Molecular Structure of 77-94-1 (Tributyl citrate)
  • Hazard Symbols ToxicT
  • Synonyms 1,2,3-Propanetricarboxylicacid, 2-hydroxy-, tributyl ester (9CI);Citric acid, tributyl ester (6CI,7CI,8CI);2-Hydroxy-1,2,3-propanetricarboxylic acid tributyl ester;Butyl citrate;Citroflex 4;Citroflex C 4;Morflex TBC;NSC 8491;Tri-n-butyl citrate;
  • PSA 99.13000
  • LogP 2.52760

Synthetic route

citric acid
77-92-9

citric acid

butan-1-ol
71-36-3

butan-1-ol

Citroflex-4
77-94-1

Citroflex-4

Conditions
ConditionsYield
With 1,3-propanesultone; sulfuric acid; manganese(II) acetate; Cycloheximide In water; toluene at 65 - 100℃; for 31h; Temperature; Ionic liquid;98.6%
With dimesitylammonium pentafluorobenzenesulfonate In n-heptane at 80℃; for 24h;97%
With 3H(1+)*O40SiW12(4-)*C21H22O3PS(1+) Concentration; Reflux; Dean-Stark;97.5%
sulfuric acid
7664-93-9

sulfuric acid

citric acid
77-92-9

citric acid

butan-1-ol
71-36-3

butan-1-ol

Citroflex-4
77-94-1

Citroflex-4

Conditions
ConditionsYield
at 150℃; sowie bei 175grad und 200grad;
citric acid
77-92-9

citric acid

butan-1-ol
71-36-3

butan-1-ol

A

monobutyl citrate
118068-28-3

monobutyl citrate

B

dibutyl ether
142-96-1

dibutyl ether

C

Citroflex-4
77-94-1

Citroflex-4

D

sym-di-n-butyl citrate
101996-65-0

sym-di-n-butyl citrate

Conditions
ConditionsYield
Amberlyst 15 at 25 - 120℃; for 16h;
Glyoxilic acid
298-12-4

Glyoxilic acid

butan-1-ol
71-36-3

butan-1-ol

A

Dibutyl maleate
105-76-0

Dibutyl maleate

B

di-n-butyl oxalate
2050-60-4

di-n-butyl oxalate

C

dibutyl succinate
141-03-7

dibutyl succinate

D

L-(-)-di-n butyl malate
1587-18-4

L-(-)-di-n butyl malate

E

dibutyl tartrate
344268-32-2

dibutyl tartrate

F

propane-1,2,3-tricarboxylic acid tributyl ester
38094-11-0

propane-1,2,3-tricarboxylic acid tributyl ester

G

Citroflex-4
77-94-1

Citroflex-4

H

dibutyl fumarate
105-75-9

dibutyl fumarate

I

C11H20O5
117538-83-7

C11H20O5

J

C12H22O4S3
94086-70-1

C12H22O4S3

Conditions
ConditionsYield
Stage #1: Glyoxilic acid With sodiumsulfide nonahydrate In water at 90℃; for 168h;
Stage #2: butan-1-ol With hydrogenchloride at 90℃; for 2h;
n-Butyl chloride
109-69-3

n-Butyl chloride

sodium citrate
68-04-2

sodium citrate

Citroflex-4
77-94-1

Citroflex-4

Conditions
ConditionsYield
Stage #1: n-Butyl chloride With potassium iodide In acetone for 2h; Inert atmosphere; Reflux;
Stage #2: sodium citrate In N,N-dimethyl-formamide at 60℃; for 3h; Temperature;
Citroflex-4
77-94-1

Citroflex-4

acetic anhydride
108-24-7

acetic anhydride

acetyltributyl citrate
77-90-7

acetyltributyl citrate

Conditions
ConditionsYield
dmap at 100℃; for 24h;93%
With 1-butyl-3-methylimidazolium 4-methylbenzenenesulfonate; 1-butyl-3-methylimidazolium Tetrafluoroborate at 50℃; for 8h;19%
at 70 - 80℃; Concentration;
vinyl acetate
108-05-4

vinyl acetate

Citroflex-4
77-94-1

Citroflex-4

acetyltributyl citrate
77-90-7

acetyltributyl citrate

Conditions
ConditionsYield
With potassium tert-butylate; 1-ethyl-3-methylimidazolium tetrafluoroborate In tetrahydrofuran at 70℃; for 12h; Reagent/catalyst; Solvent; Time; Temperature; Concentration; Inert atmosphere;81%
Citroflex-4
77-94-1

Citroflex-4

acetic acid
64-19-7

acetic acid

acetyltributyl citrate
77-90-7

acetyltributyl citrate

Conditions
ConditionsYield
[Mes2NH2](+)[O3SC6F5](-) In n-heptane at 115℃; for 48h;31%
Citroflex-4
77-94-1

Citroflex-4

1-propene-1,2,3-tricarboxylic acid tributyl ester
343599-72-4

1-propene-1,2,3-tricarboxylic acid tributyl ester

Conditions
ConditionsYield
With phosphoric acid; acetic anhydride at 155℃; durch Leiten des Reaktionsprodukts durch ein auf 425grad erhitztes Rohr;
With sulfuric acid; acetic anhydride at 155℃; durch Leiten des Reaktionsprodukts durch ein auf 425grad erhitztes Rohr;
Citroflex-4
77-94-1

Citroflex-4

hexan-1-ol
111-27-3

hexan-1-ol

tri-n-hexyl citrate
16544-70-0

tri-n-hexyl citrate

Conditions
ConditionsYield
aluminium(III) triflate at 150 - 195℃; under 37.5038 - 7500.75 Torr; Conversion of starting material;
Citroflex-4
77-94-1

Citroflex-4

C22H35ClO9

C22H35ClO9

Conditions
ConditionsYield
Multi-step reaction with 2 steps
1: tetrachloromethane / 4 h / 70 °C / Inert atmosphere
2: phosphorus trichloride / 60 °C
View Scheme
succinic acid anhydride
108-30-5

succinic acid anhydride

Citroflex-4
77-94-1

Citroflex-4

C22H36O10

C22H36O10

Conditions
ConditionsYield
In tetrachloromethane at 70℃; for 4h; Inert atmosphere;

Tributyl citrate Consensus Reports

Reported in EPA TSCA Inventory.

Tributyl citrate Standards and Recommendations

PURITY: 99.0% min
CITRIC ACID 0.2% max
MOISTURE: 0.2% max
HEAVY METALS: 10ppm max
COLOR , APHA: 50 max

Tributyl citrate Specification

The IUPAC name of Tri-n-butyl citrate is tributyl 2-hydroxypropane-1,2,3-tricarboxylate. With the CAS registry number 77-94-1, it is also named as 1,2,3-Propanetricarboxylic acid, 2-hydroxy-, tributyl ester. The product's categories are Functional Materials; Hydroxycarboxylic Acid Esters (Plasticizer); Plasticizer; Amino Ester. It is clear liquid which is insoluble in water, soluble in methanol, acetone, carbon tetrachloride, acetic acid, castor oil, mineral oil and other organic solvent. When heated to decomposition it emits acrid smoke and irritating vapors. Additionally, this chemical can be obtained by citric acid and n-butyl alcohol at the present of sulfuric acid.

The other characteristics of this product can be summarized as: (1)ACD/LogP: 4.68; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): 4.68; (4)ACD/LogD (pH 7.4): 4.68; (5)ACD/BCF (pH 5.5): 2124.92; (6)ACD/BCF (pH 7.4): 2124.65; (7)ACD/KOC (pH 5.5): 8381.24; (8)ACD/KOC (pH 7.4): 8380.19; (9)#H bond acceptors: 7; (10)#H bond donors: 1; (11)#Freely Rotating Bonds: 18; (12)Index of Refraction: 1.465; (13)Molar Refractivity: 92.26 cm3; (14)Molar Volume: 333.6 cm3; (15)Polarizability: 36.57×10-24 cm3; (16)Surface Tension: 39 dyne/cm; (17)Enthalpy of Vaporization: 73.91 kJ/mol; (18)Vapour Pressure: 1.09E-07 mmHg at 25°C; (19)Rotatable Bond Count: 17; (20)Exact Mass: 360.214803; (21)MonoIsotopic Mass: 360.214803; (22)Topological Polar Surface Area: 99.1; (23)Heavy Atom Count: 25; (24)Complexity: 382.

Uses of Tri-n-butyl citrate: It is used as GC stationary liquid, plastic, toughening agents of plastic, foam remover and solvent of cellulose nitrate. It is also used as plasticizer of polyvinyl chloride, polyethylene copolymer and cellulose resin. 

When you are using this chemical, please be cautious about it as the following:
It is toxic if swallowed. People should avoid contact with skin and eyes. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. If you want to contact this product, you must wear suitable protective clothing, gloves and eye/face protection. In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 

People can use the following data to convert to the molecule structure.
1. SMILES:O=C(OCCCC)CC(O)(C(=O)OCCCC)CC(=O)OCCCC
2. InChI:InChI=1/C18H32O7/c1-4-7-10-23-15(19)13-18(22,17(21)25-12-9-6-3)14-16(20)24-11-8-5-2/h22H,4-14H2,1-3H3

The following are the toxicity data which has been tested.

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 2900mg/kg (2900mg/kg) BEHAVIORAL: SOMNOLENCE (GENERAL DEPRESSED ACTIVITY)

VASCULAR: OTHER CHANGES
Journal of Pharmaceutical Sciences. Vol. 53, Pg. 774, 1964.
 

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