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5,5-Dimethylhydantoin

CAS 77-71-4

U.S. production volumes are classified as confidential business information.

Molecular structure of 77-71-4
US productionCBI
Import value, 2024$19M
Top sourceChina 55%

At least one company claimed its 2023 production or import volume for this chemical as confidential, so EPA withholds it.

Why supply is unknown

Production is reported production, not a complete census of factories. US production volume is confidential. Production reporting year: 2023. Import value and source-country shares describe a shared customs category, not a separate chemical measurement.

Where It Comes From

Customs basis: HS 293321 · basket

EPA reports by year
2023
US production Confidential · Imports Confidential
2019
US production Confidential · Imports Confidential

These shares come from HS customs code 293321, which covers 22 tracked chemicals in total. They estimate the category's origin mix, not this chemical specifically.

Source Countries
CN 55%ChinaTW 34%TaiwanIL 3%IsraelES 2%SpainIN 1%India
EPA-registered importers (1)
Arxada

Why It Matters

Sectors
AgricultureCore Chemicals
Downstream UsesNot recorded
FDA Shortage Status
No FDA shortage records

Industrial Uses

Used in 3 sectors as 2 functional roles.

  • •Intermediate in All Other Chemical Product and Preparation Manufacturing (10%)Processing as a reactant
  • •Intermediate in Pesticide, Fertilizer, and Other Agricultural Chemical Manufacturing (90%)Processing as a reactant
  • •Ion exchange agent in All Other Basic Organic Chemical Manufacturing (100%)Processing—incorporation into formulation, mixture, or reaction product

Vendor Pricing

$0.01/gAaron Chemicals LLC
CountryHong Kong
Pack$7.00 / 500 g
Purity98%
Vendors27 available

Prices reflect listed pack sizes. Small research packs run far above bulk rates.

26 more vendors
VendorCountry$/gPackPurity
Angene ChemicalChina → Hong Kong$0.02500 g98%
BLD Pharmatech GmbHGermany$0.041 kg97%
BLD Pharmatech Ltd.China$0.041 kg97%
A2B Chem LLCUnited States$0.04500 g97%
AA BLOCKSUnited States$0.05500 g97%
ChemsceneUnited States$0.051 kg—
Sigma-Aldrich (Rush Stock)Germany$0.111 kg97%
Sigma-AldrichGermany$0.111 kg97%
Fluorochem EUGermany$0.11100 g97%
BLD Pharmatech Co., LimitedUnited States$0.111 kg97%
Ambeed, Inc.United States$0.111 kg97%
SynthonixUnited States$0.14100 g97%
AK Scientific SpecializedUnited States$0.201 kg95%
Apollo Scientific USUnited Kingdom$0.21100 g97%
AstaTech, IncUnited States$0.24100 g95%
AK Scientific, Inc.United States$0.251 kg98%
Combi-Blocks, Inc.United States$0.251 kg97%
Angene International LimitedUnited States$0.53500 g98%
InterbioscreenHong Kong$10.0010 g95%
PharmaBlock USUnited States$12.205 g97%
Labotest KGGermany$453.001000 mg90%
Otava, Ltd.Ukraine$460.00250 mg95%
Key Organics Ltd.United Kingdom$2740.0050 mg95%
AngeneChina → Hong Kong$4266.6730 mg98%
Vitas M Chemical LimitedHong Kong$14000.005 mg90%
Princeton BioMolecular Research (SC)United States$18000.005 mg90%

Chemical Identity

CAS77-71-4
PubChem CID6491
DTXSIDDTXSID5021754
FormulaC5H8N2O2
Mol. Weight128.13 g/mol
SMILESCC1(C(=O)NC(=O)N1)C

Data Sources

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Brief citations

5,5-Dimethylhydantoin (CAS 77-71-4) https://chemicalindependence.com/chemical/77-71-4/ EPA CompTox (DSSTox): DTXSID5021754. Retrieved 2026-04-06. https://comptox.epa.gov/dashboard/chemical/details/DTXSID5021754 PubChem: 6491. Retrieved 2026-04-06. https://pubchem.ncbi.nlm.nih.gov/compound/6491 EPA Chemical Data Reporting: 77-71-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting EPA Chemical Data Reporting: CAS 77-71-4. Reporting year: 2023. https://www.epa.gov/chemical-data-reporting US Census international trade: HS 293321 for CAS 77-71-4. Reporting year: 2024. https://usatrade.census.gov/