二甲基乙内酰脲

Name: 二甲基乙内酰脲
Brand: 济南圣和化工有限公司

CAS 77-71-4C5H8N2O2MW 128.13

济南圣和化工有限公司现供应有机化学品——二甲基乙内酰脲（CAS 77-71-4），分子式 C5H8N2O2，分子量 128.13。本页理化参数仅供参考，实际常规纯度按批次COA提供(不公开发布)，以批次 COA 及订单确认为准，支持批量采购与长期供货协议。

产品概览

CAS号	77-71-4
分子式	C5H8N2O2
分子量	128.13
熔点	178 °C
LogP	log Kow = -0.48
纯度	按批次COA提供(不公开发布)
包装	按订单/批次确认(不公开发布)
应用领域	有机化学品
类别	有机化学品

应用领域

有机化学品

二甲基乙内酰脲主要应用于有机化学品。具体使用工况下的添加量与规格要求，欢迎与技术团队沟通确认。

包装与储存

包装规格按订单/批次确认(不公开发布)

纯度规格按批次COA提供(不公开发布)

储存条件密封、阴凉干燥处保存

运输常规化工运输

样品可协商提供

交期现货/按订单安排

采购提示：本产品按按订单/批次确认(不公开发布)起订发货，收到货物后请先核对包装完好性再行入库。储存条件为阴凉干燥、密封保存；如需 MSDS 或运输说明，可在询价时一并索取。

质量与文件

每批产品随货提供 COA（分析证书）；可按需提供 MSDS/技术数据表及第三方检测报告。纯度与包装以批次 COA 及订单确认为准。

关于供应商

选择济南圣和化工有限公司的理由：产品信息透明（含 CAS、分子式、理化参数）、报价响应快（一个工作日内）、单证齐全（COA/MSS/质检资料按需提供）、支持批量与长期协议供货。如需二甲基乙内酰脲以外的配套原料，也欢迎一并列出需求清单。

常见问题

二甲基乙内酰脲的 CAS 号是多少？

二甲基乙内酰脲的 CAS 号为 77-71-4。

该产品的纯度和包装规格是什么？

常规纯度规格为按批次COA提供(不公开发布)，包装为按订单/批次确认(不公开发布)，随货提供 COA。

二甲基乙内酰脲有什么用途？

主要应用于有机化学品。

如何购买或获取报价？

请发送邮件至 info@591daili.com 或通过 WhatsApp 联系，注明产品名称、CAS 号与需求数量，一个工作日内回复报价。供应商：济南圣和化工有限公司。

PubChem 公开数据

Description

5,5-Dimethylhydantoin · CAS 77-71-4 · C5H8N2O2. UNII 34032MQ9RO. Melting Point: 178 °C; Vapor Pressure: 0.0000028 [mmHg]; LogP: log Kow = -0.48.

Identification

CAS Registry Number	77-71-4
PubChem CID	6491
Molecular formula	C5H8N2O2
IUPAC name	5,5-dimethylimidazolidine-2,4-dione
UNII (FDA)	34032MQ9RO

Computed Descriptors

Molecular Weight	128.13
XLogP3	-0.3
Hydrogen Bond Donor Count	2
Hydrogen Bond Acceptor Count	2
Rotatable Bond Count	0
Exact Mass	128.058577502
Monoisotopic Mass	128.058577502
Topological Polar Surface Area	58.2
Heavy Atom Count	9
Formal Charge	0

Physical & Chemical Properties

Melting Point	178 °C
Vapor Pressure	0.0000028 [mmHg]
LogP	log Kow = -0.48
LogP	-0.48
Dissociation Constants	pKa = 9.19
Formulations/Preparations	Reagent grade: 97%

Physical description & handling notes

Large Crystals; Liquid
White solid; [Hawley] White odorless crystalline powder; [Alfa Aesar MSDS]
White, crystalline solid
Prisms from dilute alcohol
Sublimes
Very soluble in ethanol, ether, acetone, benzene, chloroform; soluble in DMSO

Regulatory Status

Regulatory & Food Contact	FDA Cumulative Estimated Daily Intake (CEDI): FCS FDA Inventory of Effective Food Contact Substance (FCS) Noti: FCS 2,4-IMIDAZOLIDINEDIONE, 5,5-DIMETHYL 5,5-Dimethylhydantoin (DMH) (CAS Reg. No. 77-71-4) The FCS will be used as a stabilizer for hypohalite slimicides used in the manufacture of food-contact paper a The FCS will be used at a level not to exceed 0.5 g DMH per kg of dry fiber.
GHS notification summary	91% (252 / 277)

GHS Hazard Classification

GHS notification summary	91% (252 / 277)

This chemical does not meet GHS hazard criteria for 91% (252 of 277) of all reports.

Reported as not meeting GHS hazard criteria by 252 of 277 companies (only 9% companies provided GHS information). For more detailed information, please visit ECHA C&L website.

Documented Uses

Synthesis, preparation of water-soluble polymers
Cosmetics -> Viscosity controlling; Hair conditioning
Information on 6 consumer products that contain 5,5-Dimethyl-2,4-imidazolidinedione in the following categories is provided:
From acetone, urea, and ammonium carbonate; from acetone, potassium cyanate and hydrocyanic acid
2023: 1,000,000 - <8,500,000 lb
2022: 1,000,000 - <8,500,000 lb

Synonyms

5,5-DIMETHYLHYDANTOIN; 77-71-4; Dimethylhydantoin; 2,4-Imidazolidinedione, 5,5-dimethyl-; Dantoin DMH; 5,5-Dimethyl-2,4-imidazolidinedione; Dantoin 736; 5,5-Dimethyl hydantoin; Hydantoin, 5,5-dimethyl-; DTXSID5021754; 34032MQ9RO; NSC-8652; DTXCID601754; RefChem:527790; 201-051-3; 5,5-dimethylimidazolidine-2,4-dione

Frequently Asked Questions

What are the CAS number and molecular formula of 5,5-Dimethylhydantoin?

CAS 77-71-4; molecular formula C5H8N2O2; molecular weight — g/mol.

What other names is 5,5-Dimethylhydantoin known by?

5,5-DIMETHYLHYDANTOIN, 77-71-4, Dimethylhydantoin, 2,4-Imidazolidinedione, 5,5-dimethyl-, Dantoin DMH, 5,5-Dimethyl-2,4-imidazolidinedione.

What is the regulatory status of 5,5-Dimethylhydantoin?

Documented regulatory listings: FDA Cumulative Estimated Daily Intake (CEDI): FCS; FDA Inventory of Effective Food Contact Substance (FCS) Noti: FCS; 2,4-IMIDAZOLIDINEDIONE, 5,5-DIMETHYL.

Is 5,5-Dimethylhydantoin classified as hazardous?

91% of GHS notifications report no hazard classification (252 of 277).

What are the key physical properties of 5,5-Dimethylhydantoin?

Melting Point: 178 °C; Vapor Pressure: 0.0000028 [mmHg]; LogP: log Kow = -0.48; LogP: -0.48.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.