Glycine

Molecular Structure:

Molecular Formula: C₂H₅NO₂
Molecular Weight: 75.0666
IUPAC Name: 2-Aminoacetic acid
Synonyms of Glycine (CAS NO.56-40-6): 2-Aminoacetic acid ; AI3-04085 ; Acetic acid, amino- ; Acide aminoacetique ; Acide aminoacetique [INN-French] ; Acido aminoacetico ; Acido aminoacetico [INN-Spanish] ; Acidum aminoaceticum ; Acidum aminoaceticum [INN-Latin] ; Aciport ; Aminoacetic acid ; Aminoacetic acid 1.5% in plastic container ; Aminoazijnzuur ; Aminoethanoic acid ; Amitone ; CCRIS 5915 ; EINECS 200-272-2 ; FEMA No. 3287 ; GLY (IUPAC abbrev) ; Glicina ; Glicina [INN-Spanish] ; Glicoamin ; Glycin ; Glycine 1.5% in plastic container ; Glycine, non-medical ; Glycinum ; Glycinum [INN-Latin] ; Glycocoll ; Glycolixir ; Glycosthene ; HSDB 495 ; Hampshire glycine ; L-Glycine ; Leimzucker ; NSC 25936 ; Padil ; Sucre de gelatine ; UNII-TE7660XO1C
CAS NO: 56-40-6
Classification Code: Component of irrigating solution ; Glycine Agents ; Mutation data ; Neurotransmitter Agents
Melting point: 240 °C
Index of Refraction: 1.46
Molar Refractivity: 16.41 cm³
Molar Volume: 59.8 cm³
Surface Tension: 54.4 dyne/cm
Density: 1.254 g/cm³
Flash Point: 99.5 °C
Enthalpy of Vaporization: 52.63 kJ/mol
Boiling Point: 240.9 °C at 760 mmHg
Vapour Pressure: 0.0123 mmHg at 25°C 

 Glycine (CAS NO.56-40-6) has many uesage:
1.Animal and human foodstuffs:
use an additive in pet food and animal feed. For humans, glycine is used as a sweetener/taste enhancer. such as Food supplements and protein drinks.some drug formulations use glycine to improve gastric absorption.
2.Chemical feedstock
Glycine is an intermediate in the synthesis of a variety of chemical products. It is used in the manufacture of the herbicide Glyphosate. Glyphosate (N-(phosphonomethyl) glycine) is a non-selective systemic herbicide used to kill weeds, especially perennials and broadcast or used in the cut-stump treatment as a forestry herbicide. Initially, Glyphosate was sold only by Monsanto under the Monsanto tradename Roundup, but is no longer under patent
3.Cosmetics and other applications:
Glycine can be used  as a buffering agent in  analgesics, antacids, cosmetics, antiperspirants, and toiletries.Many products use glycine or its derivatives, such as the production of rubber sponge products, fertilizers, metal complexants.

 Glycine (CAS NO.56-40-6)e is manufactured  by treating chloroacetic acid with ammonia industrially
ClCH₂COOH + 2 NH₃ → H₂NCH₂COOH + NH₄Cl
It also can be  produced via the Strecker amino acid synthesis.

Risk Statements of Glycine (CAS NO.56-40-6): 33 
R33: Danger of cumulative effects.
Safety Statements: 22-24/25
S22: Do not breathe dust. 
S24/25: Avoid contact with skin and eyes.

In the USA, glycine is typically sold in two grades: USP ("United States Pharmacopeia"), and technical grade.the two grades have diverse uses.
Pharmaceutical grade Glycine (CAS NO.56-40-6) is use in some pharmaceutical applications, such as intravenous injections, where the customer's purity requirements often exceed the minimum required under the USP grade designation.
Technical grade glycine, which may or may not meet USP grade standards, often use in industrial applications; such as an agent in metal complexing and finishing.