Bicine Property

Melting point:

190 °C (dec.)(lit.)

Boiling point:

290.25°C (rough estimate)

Density 

1.05 g/mL at 20 °C

vapor pressure 

0.002-0.007Pa at 20-25℃

refractive index 

1.4240 (estimate)

storage temp. 

room temp

solubility 

H₂O: 1 M at 20 °C, clear, colorless

form 

Powder

color 

White

PH

4.0-5.5 (25℃, 1M in H2O)

pka

8.3(at 25℃)

PH Range

7.6 - 9.0

Water Solubility 

soluble

λmax

λ: 260 nm Amax: 0.070
λ: 280 nm Amax: 0.040

Merck 

14,1201

BRN 

1769362

LogP

2.3 at 20℃ and pH7

Surface tension

72.2mN/m at 1g/L and 20℃

CAS DataBase Reference

150-25-4(CAS DataBase Reference)

EPA Substance Registry System

Bicine (150-25-4)

Safety

Hazard Codes 

Xn

Risk Statements 

20/21/22-36/37/38

Safety Statements 

24/25-36-26

WGK Germany 

3

RTECS 

MB9700000

F 

3-10

TSCA 

Yes

HS Code 

29225000

Toxicity

mouse,LD50,intraperitoneal,1540mg/kg (1540mg/kg),KIDNEY, URETER, AND BLADDER: "CHANGES IN TUBULES (INCLUDING ACUTE RENAL FAILURE, ACUTE TUBULAR NECROSIS)",Revue d'Epidemiologie, Medecine Sociale et Sante Publique. Vol. 10, Pg. 391, 1962.

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H332Harmful if inhaled

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Bicine Chemical Properties,Usage,Production

Description

Bicine is an amino acid that results from amine degradation due to the presence of oxygen and/or sulfur dioxide. The amine solvents that undergo this degradation are MDEA, DEA, TEA, and mixed amine solvents containing any of these amines. As a zwitterionic amino acid buffer agent, bicine is active in the pH 7.6-9.0 range (pKa of 8.26 at 25°C). Bicine is a recommended buffer for low-temperature biochemical work. It is used for the preparation of stable substrate solution for serum guanase determination. It can be used as a nitrogenous strength enhancer to regulate cement hydration and improve cement properties. Studies have found that bicine significantly changes the morphology of portlandite crystals from a parallel-stacked lamellar shape to a distorted one and also decreases the pore size of the hardened cement paste at an early age[1]. In particular, bicine could promote the rapid formation of β-sheet-rich amyloid-β fibrils[2].

Chemical Properties

Bicine is a white/clear crystalline powder that is somewhat soluble in water. It contains an amino group, carboxyl group, and two hydroxyl units in its structure, making it highly polar. It is often used as a biological buffer and chelating agent.

Uses

To prepare stable substrate solution for the determination of guanine deaminase. The buffer is widely used with the working concentration of 3-100mM.

Uses

A zwitterionic amino acid buffer agent used for low temperature work. The use of bicine in a thin layer ion exchange chromatography method for protein resolution has been published. Bicine has been utilized in peptide and protein crystallization. A kinetic study of a quaternary transition-state analogue complex of creatine kinase used bicine in the reaction buffer. A multiphasic buffer system for SDS-PAGE of proteins and peptides that incorporates bicine has been described.

Definition

ChEBI: N,N-bis(2-hydroxyethyl)glycine is a bicine that is a Good's buffer substance, pKa = 8.35 at 20 ℃. It is a conjugate acid of a [bis(2-hydroxyethyl)amino]acetate. It is a tautomer of a [bis(2-hydroxyethyl)ammonio]acetate.

Purification Methods

Dissolve bicine in a small volume of hot water and precipitate it with EtOH, twice. Repeat once more but treat the aqueous solution with charcoal Purification of Biochemicals — Amino Acids and Peptides and filter before adding EtOH. Also crystallise it from concentrated aqueous solutions. [Torn & Kolthoff J Am Chem Soc 77 2061 1955, Chaberek et al. J Am Chem Soc 75 2185 1953, Beilstein 4 IV 2390.]

References

[1] Lu X, et al. The influence of bicine on the hydration and properties of Portland cement. Journal of Thermal Analysis and Calorimetry, 2022; 147: 13125–13134.
[2] Kim H, et al. Bicine promotes rapid formation of β-sheet-rich amyloid-β fibrils. PLOS ONE, 2020.