Molecular Formula: C₁₁H₁₈N₂O₈
Molar mass: 306.2692 g/mol
EINECS: 224-559-7
Density:1.505 g/cm³
Flash Point: 319.6 °C
Index of Refraction: 1.569
Boiling Point: 604.9 °C at 760 mmHg
Vapour Pressure: 3.44E-16 mmHg at 25°C
Melting point: 241 °C (dec.)(lit.)
Appearance: White microcrystalline powder
Product categories: Chelating Reagents;Analytical Chemistry;EDTA Analogs;Complexones
Structure of Propanoldiaminetetracetic acid (4408-81-5):
              
XLogP3-AA: -5.4
H-Bond Donor: 4
H-Bond Acceptor: 10
Systematic Name: 2-[[2-(Bis(carboxymethyl)amino)-1-methyl-ethyl]-(carboxymethyl)amino]acetic acid 
SMILES: O=C(O)CN(CC(=O)O)CC(N(CC(=O)O)CC(=O)O)C 
InChI: InChI=1/C11H18N2O8/c1-7(13(5-10(18)19)6-11(20)21)2-12(3-8(14)15)4-9(16)17/h7H,2-6H2,1H3,(H,14,15)(H,16,17)(H,18,19)(H,20,21) 
InChIKey: XNCSCQSQSGDGES-UHFFFAOYAE 
Std. InChI: InChI=1S/C11H18N2O8/c1-7(13(5-10(18)19)6-11(20)21)2-12(3-8(14)15)4-9(16)17/h7H,2-6H2,1H3,(H,14,15)(H,16,17)(H,18,19)(H,20,21) 
Std. InChIKey: XNCSCQSQSGDGES-UHFFFAOYSA-N

Carcinogenicity of Propanoldiaminetetracetic acid (4408-81-5) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65.You can see actual entry in RTECS for complete information.

A poison by intraperitoneal route. When heated to decomposition it emits toxic vapors of NO_x.
 

Hazard Codes: Xi
Risk Statements:
36:  Irritating to the eyes
37:  Irritating to the respiratory system
38:  Irritating to the skin
Safety Statements:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
36:  Wear suitable protective clothing

 Propanoldiaminetetracetic acid (4408-81-5) also can be called PDTA ; 1,2-Propylenediamine tetraacetic acid ; 1,2-Diaminopropanetetraacetic acid and (DL)-(Methylethylene)dinitrilotetraacetic acid .It is hazardous,so the first aid measures and others should be known.Such as: When on the skin: first,should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing. Secondly,Get shoesmedical aid . Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.Then get medical aid soon.While ,it's Inhaled: Remove from exposure and move to fresh air immediately.Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product : If victim is conscious and alert, give 2-4 cupfuls of milk or water, and get medical aid immediately.
In addition, Propanoldiaminetetracetic acid (4408-81-5) can be stable under normal temperature and pressure conditions.It is not compatible with strong oxidizing agents And also prevent it to broken down into hazardous decomposition products: irritating and toxic fumes and gases.Also known its polymerization is hazardous.