Does DL in DL-Homocysteine Thiolactone Hydrochloride mean a single enantiomer?

No. DL denotes the racemic D and L form rather than one optically defined enantiomer. CAS 6038-19-3 identifies the racemic hydrochloride; the isolated D and L salts have distinct stereochemical identities. If optical composition matters, specify D, L or DL and the required chiral or optical test.

DL-Homocysteine Thiolactone Hydrochloride CAS 6038-19-3

DL-Homocysteine Thiolactone Hydrochloride (CAS 6038-19-3), also called 3-Aminothiolan-2-one hydrochloride, is a cyclic thioester amino compound used in ring-opening, derivatization and sulfur-containing synthesis. Confirm identity, assay, stereochemical form, water, related substances and physical form against the current COA and SDS.

CAS: 6038-19-3
Synonyms: DL-Homocysteine Thiolactone Hydrochloride, DL-Homocysteine Thiolactone HCl, 3-Aminothiolan-2-one hydrochloride, Homocysteine thiolactone hydrochloride
Einecs: 227-923-3
Molecular Formula: C₄H₈ClNOS
Grade: Specified by identity, assay, stereochemical form, water, related substances, physical form and lot traceability; see the current COA.
Package: Confirm container, light or moisture protection, net weight, storage and transport against the current COA and SDS.

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Product Description

1 Identity and physicochemical profile

2 Applications and grade selection

3 Storage and handling

4 Safety, documentation and procurement

Identity and physicochemical profile

Item	Technical guidance
Correct identity	DL-Homocysteine thiolactone hydrochloride; 3-aminothiolan-2-one hydrochloride
CAS / EC	6038-19-3 / 227-923-3
Formula / molecular weight	C₄H₈ClNOS / 153.63 g/mol
Stereochemical form	DL or racemic material; do not substitute an enantiopure D or L grade without route assessment
Identity boundary	CAS 6027-13-0 refers to DL-homocysteine, not the thiolactone hydrochloride
Key purchase controls	Identity, assay, stereochemical form, water, related substances, physical form and lot traceability

Applications and grade selection

DL-Homocysteine Thiolactone Hydrochloride is evaluated as a cyclic thioester amino-compound intermediate in ring-opening, derivatization and sulfur-containing synthesis routes, as well as controlled biochemical research.

Confirm that the project requires the DL material and not an enantiopure homocysteine thiolactone salt.
Compare identity, assay, water, related substances and reaction performance using the buyer’s approved methods.
Define any research, GMP, compendial, traceability or change-control requirements before quotation.

Storage and handling

Store tightly closed and protected from moisture and incompatible materials under the conditions stated in the current SDS and product documentation.

Safety, documentation and procurement

Use gloves, eye protection, dust control and appropriate ventilation according to the current SDS and site risk assessment. Procurement should state the stereochemical form, specification, use, quantity, packaging, destination and required quality documents.

FAQ - Technical & Supply Chain

Q:
Does DL in DL-Homocysteine Thiolactone Hydrochloride mean a single enantiomer?

A: No. DL denotes the racemic D and L form rather than one optically defined enantiomer. CAS 6038-19-3 identifies the racemic hydrochloride; the isolated D and L salts have distinct stereochemical identities. If optical composition matters, specify D, L or DL and the required chiral or optical test.

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