Trimethyl orthoformate CAS: 149-73-5 98% >98% Acetalization Building Block & Ortheoster Reagent for Organic Synthesis



Trimethyl orthoformate (triethyl formiate, CAS: 149-73-5) is an important organic synthetic intermediate belonging to the formiate ester class, with the chemical formula C₄H₁₀O₃ and a molecular weight of 106.12. At room temperature, it appears as a colorless transparent liquid with a slight ether-like odor, readily soluble in organic solvents such as ethanol, ether, and acetone, but readily hydrolyzes upon contact with water to produce methyl formiate, methanol, and formaldehyde.

Core Feature

Boiling point: 101–102 °C (at atmospheric pressure)

Density: approximately 0.97 g/cm³ (at 20 °C)

Flash point: 15 °C (closed cup test, flammable liquid)

refractive index: 1.377–1.379 (20 °C)

Purity specifications: Industrial grade ≥99%; Reagent grade ≥99.5%; Electronic grade up to 99.99%.

Storage conditions: Store in a sealed container in a cool, dry place, away from sources of ignition, water, and strong oxidizing agents.

security information

Risk category: Flammable liquid (Category 3), with skin/eye irritation potential

Firefighting measures: Use dry powder, carbon dioxide, or foam for extinguishing; water use is prohibited.

emergency handling ：

Skin contact: Immediately rinse with plenty of water.

Eye contact: Lift the eyelids and rinse with normal saline for at least 15 minutes.

Inhalation: Immediately move to fresh air and ensure unobstructed breathing.

This product is intended for research,development, and industrial chemical synthesis as a building block and reagent only.

Shandong Changyuan Chemical Co.Ltd. is mainly manufacturing and dealing in sales of fine chemical products. It was built in 2022 and mainly focuses on innovation, reseach and development. We have ccoperation with many customers at home and abroad. The company has a professional production base. The main products: Acryiic acid, vinyl acetate, methyl methacrylateetc. It has been popular around. We will strive for greater success with products, prices,services and quality. Quality is our culture.

Amid the wave of transformation in the chemical industry, Shandong Changyuan Chemical Co., Ltd. has consistently regarded quality and service as the twin pillars of its development. With a commitment to excellence and attentive, comprehensive services, the company has steadily advanced in the fiercely competitive market, earning the trust of its clients and recognition from the industry.

Quality is the lifeline of an enterprise—a principle that has become deeply ingrained at Shandong Changyuan Chemical. The company has established a comprehensive quality management system covering the entire process, from raw material procurement to finished product delivery, with stringent standards and rigorous controls at every stage. During the procurement phase, the purchasing team conducts multidimensional evaluations of suppliers, examining factors ranging from origin and composition to production processes, ensuring only high-standard materials enter production. In manufacturing, advanced equipment works in tandem with specialized technical personnel, with real-time monitoring systems deployed at each stage; any deviation from specifications triggers immediate alerts, enabling prompt adjustments by technicians. Additionally, the company conducts regular internal quality audits and invites industry experts for guidance to continuously refine its quality management system, guaranteeing consistent product reliability. Through its unwavering commitment to quality, the company has earned a strong market reputation and become the preferred choice for numerous clients.

Service serves as the bridge connecting enterprises with their customers, and Shandong Changyuan Chemical has spared no effort in delivering exceptional service. The company has established a professional customer service team equipped with solid chemical engineering expertise, strong communication skills, and a strong service orientation. Whether providing pre-sales product consultations, technical guidance during sales, or post-sales issue resolution, the team responds swiftly to offer comprehensive support. For tailored solutions addressing diverse customer needs, the company forms dedicated service teams that thoroughly understand clients' production processes and practical requirements. Additionally, regular customer follow-ups are conducted to gather feedback, enabling continuous improvement of products and services. It is this customer-centric service philosophy that has enabled Shandong Changyuan Chemical to build long-term, stable partnerships with its clients, with customer satisfaction steadily increasing.

Driven by both quality and service excellence, Shandong Changyuan Chemical has continued to grow and strengthen. Moving forward, the company will remain committed to maintaining its quality standards, enhance its service offerings, and deliver superior products and more attentive services to support the high-quality development of the chemical industry, working hand in hand

Q1: What is the purity of this product, and can you provide COA?

A1: Our product typically has a purity of ≥99.0%. We can provide a Certificate of Analysis (COA) for each batch, detailing the assay, moisture content, and other key parameters. Please refer to our attached file or contact us for a copy.

Q2: What is your Minimum Order Quantity (MOQ) and Lead Time?

A2: For this product, our MOQ is 1 ton. The lead time is approximately 15-20 days after order confirmation and payment. If you have a trial order, we can also offer smaller packaging.

Q3: What is the packaging option for this chemical?

A3: Standard packaging is 25 kg net in cardboard drums. We can also customize packaging according to your requirements.

Q4: What payment terms do you accept?

A4: We typically accept T/T (Telegraphic Transfer) and L/C at sight