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Thiodiglycolic acid

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Thiodiglycolic acid

EINECS 204-663-9
CAS No. 123-93-3 Density 1.535 g/cm3
Solubility soluble in water Melting Point 128-131 °C(lit.)
Formula C4H6O4S Boiling Point 377 °C at 760 mmHg
Molecular Weight 150.16 Flash Point 181.8 °C
Transport Information UN 3261 8/PG 2 Appearance greyish crystalline powder
Safety 26-36/37/39-45 Risk Codes 36/37/38-34
Molecular Structure Molecular Structure of 123-93-3 (Acetic acid,2,2'-thiobis-) Hazard Symbols CorrosiveC

Aceticacid, thiobis- (3CI);Acetic acid, thiodi- (6CI,7CI,8CI);(Carboxymethylthio)acetic acid;2,2'-Thiobis[acetic acid];2,2'-Thiodiaceticacid;2,2'-Thiodiethanoic acid;2,2'-Thiodiglycolic acid;Dicarboxymethylsulfide;Dimethylsulfide-a,a'-dicarboxylic acid;Mercaptodiacetic acid;NSC 28743;NSC 40469;NSC 52326;Thiodiacetic acid;b,b'-Thiodiglycolic acid;


Thiodiglycolic acid Consensus Reports

Reported in EPA TSCA Inventory.

Thiodiglycolic acid Specification

The Mercaptodiacetic acid is an organic compound with the formula C4H6O4S. The IUPAC name of this chemical is 2-(carboxymethylsulfanyl)acetic acid. With the CAS registry number 123-93-3, it is also named as 2,2'-Sulfanediyldiacetic acid. Besides, it is a greyish crystalline powder, which is used as detection of copper, lead, mercury, silver.

Physical properties about Mercaptodiacetic acid are: (1)ACD/LogP: -0.78; (2)ACD/LogD (pH 5.5): -4.37; (3)ACD/LogD (pH 7.4): -5.53; (4)ACD/BCF (pH 5.5): 1; (5)ACD/BCF (pH 7.4): 1; (6)ACD/KOC (pH 5.5): 1; (7)ACD/KOC (pH 7.4): 1; (8)#H bond acceptors: 4; (9)#H bond donors: 2; (10)#Freely Rotating Bonds: 4; (11)Polar Surface Area: 77.9 Å2; (12)Index of Refraction: 1.561; (13)Molar Refractivity: 31.7 cm3; (14)Molar Volume: 97.7 cm3; (15)Polarizability: 12.56×10-24cm3; (16)Surface Tension: 72.7 dyne/cm; (17)Density: 1.535 g/cm3; (18)Flash Point: 181.8 °C; (19)Enthalpy of Vaporization: 68.6 kJ/mol; (20)Boiling Point: 377 °C at 760 mmHg; (21)Vapour Pressure: 1.01E-06 mmHg at 25°C.

Uses of Mercaptodiacetic acid: it can be used to produce [1,4]oxathiane-2,6-dione by heating. It will need reagent Ac2O with reaction time of 3 hours. The yield is about 87%.

When you are using this chemical, please be cautious about it as the following:
It can cause burns. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. Besides, this chemical is irritating to eyes, respiratory system and skin. When you are using it, wear suitable gloves and eye/face protection. In case of accident or if you feel unwell seek medical advice immediately (show the label where possible).

You can still convert the following datas into molecular structure:
(2)InChI: InChI=1/C4H6O4S/c5-3(6)1-9-2-4(7)8/h1-2H2,(H,5,6)(H,7,8)
(4)Std. InChI: InChI=1S/C4H6O4S/c5-3(6)1-9-2-4(7)8/h1-2H2,(H,5,6)(H,7,8)

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 300mg/kg (300mg/kg)   National Technical Information Service. Vol. AD277-689,
rat LD oral > 500mg/kg (500mg/kg)   National Academy of Sciences, National Research Council, Chemical-Biological Coordination Center, Review. Vol. 5, Pg. 8, 1953.

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