Name | Thiodiglycolic acid |
Synonyms | usafcb-36 thiodi(acetic Thiodiglycolic thiodi-aceticaci Thiodi(essigsure) Thiodiacetic acid Thiodiglycolic acid thiodiglycollic acid ThiodiglycolicAcidA.R. 2,2'-thiobis-aceticaci dicarboxymethylsulfide 2,2-Thiodiglycolic acid 2,2'-thiodiethanoicacid 2,2-Mercaptodiacetic acid 2,2'-sulfanediyldiacetate (carboxymethylthio)aceticacid 2,2'-sulfanediyldiacetic acid beta,beta'-thiodiglycolicacid 2-(2-mercapto-2-oxoethoxy)acetic acid Dimethylsulfide-α,α'-dicarboxylic acid 2,2'-sulfanediylbis(hydroxyacetic acid) 2,2μ-Thio-bis(acetic acid), Dicarboxydimethyl sulfide, Thiodiglycolic acid |
CAS | 123-93-3 |
EINECS | 204-663-9 |
InChI | InChI=1/C4H6O4S/c5-3(6)1-9-2-4(7)8/h1-2H2,(H,5,6)(H,7,8)/p-2 |
Molecular Formula | C4H6O4S |
Molar Mass | 150.15 |
Density | 1.352 (estimate) |
Melting Point | 128-131°C(lit.) |
Boling Point | 241.69°C (rough estimate) |
Flash Point | 181.8°C |
Water Solubility | soluble |
Solubility | 400g/l |
Vapor Presure | 1.01E-06mmHg at 25°C |
Appearance | White to beige powder |
Color | White to grayish |
Merck | 14,9331 |
BRN | 1764392 |
pKa | pK1:3.32;pK2:4.29 (25°C) |
PH | 2.2 (10g/l, H2O, 20℃) |
Storage Condition | Store below +30°C. |
Sensitive | Stench |
Refractive Index | 1.5500 (estimate) |
MDL | MFCD00004359 |
Use | Antioxidants, and for the production of thioester antioxidants |
Hazard Symbols | C - Corrosive |
Risk Codes | R36/37/38 - Irritating to eyes, respiratory system and skin. R34 - Causes burns |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
UN IDs | UN 3261 8/PG 2 |
WGK Germany | 3 |
RTECS | AJ6475000 |
FLUKA BRAND F CODES | 13 |
TSCA | Yes |
HS Code | 29309070 |
Hazard Note | Corrosive/Stench |
Hazard Class | 8 |
Packing Group | III |
Toxicity | LD50 orally in Rabbit: > 2000 mg/kg |
Raw Materials | Acrylonitrile sodium hydrosulfide Sulfuric acid |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
overview | thiodiacetic acid is a carboxylic acid organic compound, which can be used as an intermediate in pharmaceutical synthesis. |
preparation | preparation of thiodiacetic acid: add 540g(3.6mol) of DL-methionine, 408g(4.32mol) of chloroacetic acid and 3L of water to a 5L four-mouth flask, stir evenly, slowly heat to 80 ℃, and react for 8 hours; After the reaction is over, the solvent water is recovered by cooling under reduced pressure, A total of 936g of DL-homoserine lactone hydrochloride, methylthioacetic acid and thiodiacetic acid mixture were obtained respectively. |
Use | Antioxidants, and used to produce thioester antioxidants |
spontaneous combustion temperature | 350°C |
toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |