Phenyldichlorosilane CAS 1631-84-1 Identity Verification Guide
Molecular Weight Discrepancies (177.09 vs 253.19) Causing Order Quantity Miscalculations
In industrial procurement, precise molar calculations are critical for reaction scaling. A common financial loss vector arises from confusing Phenyldichlorosilane (CAS 1631-84-1) with heavier structural analogs such as Diphenyldichlorosilane. The molecular weight discrepancy between 177.09 g/mol and 253.19 g/mol represents a significant variance in molar equivalence. If a procurement manager orders based on mass without verifying the specific molecular weight tied to the CAS number, the resulting stoichiometric imbalance can halt production lines.
For example, ordering 1000 kg of the heavier analog instead of the target silane results in approximately 30% fewer moles delivered. This deficit disrupts downstream synthesis routes, particularly in organosilicon reagent applications where exact molar ratios dictate polymer chain length or surface modification efficacy. At NINGBO INNO PHARMCHEM CO.,LTD., we emphasize verifying the molecular weight against the CAS registry before finalizing purchase orders to prevent these costly miscalculations.
CAS Number 1631-84-1 Validation to Prevent Structural Analog Financial Loss
The CAS Registry Number serves as the unique identifier for chemical substances, yet procurement errors often occur when suppliers list generic names like "Phenylsilicon dichloride" without explicit CAS validation. Structural analogs within the organosilicon family share similar nomenclature but possess distinct reactivity profiles. Phenyldichlorosilane contains a reactive Si-H bond, whereas analogs like Phenyltrichlorosilane lack this hydrogen functionality.
Validation requires cross-referencing the CAS number 1631-84-1 with the molecular formula C6H6Cl2Si. Failure to validate this identity can lead to the delivery of a chemical building block that is incompatible with the intended synthesis route. This is particularly critical when sourcing a global manufacturer, as regional naming conventions may vary. Ensuring the CAS number matches the technical documentation is the primary defense against receiving incorrect inventory.
Stoichiometric Risks in Procurement Planning and Molecular Formula Verification
Procurement planning must account for the specific reactivity of the molecular formula C6H6Cl2Si. Beyond standard purity metrics, field experience indicates that environmental exposure during transit can alter effective stoichiometry. Phenyldichlorosilane is moisture-sensitive and hydrolyzes rapidly upon contact with water or protic solvents. In winter shipping scenarios, temperature fluctuations can cause condensation inside packaging if nitrogen padding is compromised.
This non-standard parameter—ambient moisture ingress during logistics—is rarely captured on a standard Certificate of Analysis generated at the time of manufacture. However, it directly impacts the available active silane content upon arrival. If the container headspace was not properly inerted, hydrolysis may begin before the drum is opened, reducing the effective yield for surface modification or polymerization reactions. Procurement managers should request details on packaging integrity and inert gas protection to mitigate these stoichiometric risks.
Comparative Molecular Formula and CAS Registry Data Tables for Identity Security
To secure identity verification, procurement teams should utilize comparative data tables to distinguish the target chemical from common analogs. The following table outlines the critical distinctions between Phenyldichlorosilane and frequently confused structural variants.
| Parameter | Phenyldichlorosilane | Diphenyldichlorosilane | Phenyltrichlorosilane |
|---|---|---|---|
| CAS Registry Number | 1631-84-1 | 1139-30-6 | 98-13-5 |
| Molecular Formula | C6H6Cl2Si | C12H10Cl2Si | C6H5Cl3Si |
| Molecular Weight (g/mol) | 177.09 | 253.19 | 211.52 |
| Reactive Functionality | Si-H, Si-Cl | Si-Cl | Si-Cl |
This data confirms that while the names are similar, the chemical behavior differs significantly. The presence of the Si-H bond in CAS 1631-84-1 allows for specific reduction reactions not possible with the analogs listed. For detailed specifications on our available grades, review our high-purity Phenyldichlorosilane 1631-84-1 product page.
Bulk Packaging Technical Specifications and Identity Parameters for Procurement
Physical packaging specifications are vital for maintaining chemical identity during transport. Phenyldichlorosilane is typically shipped in steel drums or IBCs equipped with pressure-relief valves to manage gas evolution from minor hydrolysis. The packaging must be sealed under an inert atmosphere to prevent moisture contamination. Procurement contracts should specify the packaging type, such as 210L drums or ISO tanks, to ensure compatibility with facility unloading systems.
When planning logistics, it is essential to consider loading constraints to maintain package integrity. For applications requiring precise formulation, understanding the optimizing loading thresholds for structural adhesive humidity resistance ensures that the material arrives in a state suitable for immediate use. Documentation accompanying the shipment must include the batch number and manufacturing date to trace identity parameters back to the production run.
Frequently Asked Questions
How do I distinguish Phenyldichlorosilane from Phenyltrichlorosilane during intake?
Verification should rely on the CAS Registry Number and molecular formula rather than physical appearance. Phenyldichlorosilane contains a silicon-hydrogen bond which alters its reactivity compared to the trichloro analog. Confirm the CAS 1631-84-1 on the container label matches your purchase order before accepting the shipment.
Why is molecular weight critical for ordering this chemical?
Molecular weight determines the molar quantity delivered per kilogram. A discrepancy between 177.09 g/mol and higher weight analogs results in fewer moles per unit mass. This affects reaction stoichiometry and can lead to incomplete synthesis if not accounted for in the formulation planning.
Does the structural formula affect storage requirements?
Yes, the presence of chlorosilane bonds makes the material sensitive to moisture regardless of the specific phenyl substitution. All chlorophenylsilanes require dry, inert storage conditions to prevent hydrolysis and pressure buildup within the container.
Sourcing and Technical Support
Secure sourcing requires validated identity parameters and robust technical support. When evaluating suppliers, prioritize those who provide comprehensive documentation linking the CAS number to the batch-specific analysis. For further technical details on verifying chemical identity through spectral data, refer to our guide on verifying Si-H bond confirmation metrics. NINGBO INNO PHARMCHEM CO.,LTD. is committed to providing accurate technical data and reliable supply chains for industrial intermediates. To request a batch-specific COA, SDS, or secure a bulk pricing quote, please contact our technical sales team.