Technical Data Sheet

Sodium Metabisulfite - ACS Grade

ACS Grade

Alliance Code: sodium-metabisulfite-acs-grade
確認日: 2026-07-17
Revision: 1.5

CAS番号: 7681-57-4
構造: 構造・PubChem
グレード: ACS Grade
注意喚起語: Danger
危険有害性: 腐食性刺激性 / 有害性H302 H318

Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer.

Identity & Composition

製品名: Sodium Metabisulfite - ACS Grade
Alliance Code: sodium-metabisulfite-acs-grade
グレード: ACS Grade
濃度: —
CAS番号: 7681-57-4PubChem
化学式: —PubChem
分子量: —PubChem
製品種別: Pure substance

Specifications

Test	Specification	Typical	Method	Source
Assay (Na2S2O5)	Min. 97.0%	98.8%	—	Interpreted
Chloride (Cl)	Max. 0.05 %	0.0039 %	—	Interpreted
Heavy metals (as Pb)	Max. 0.001 %	0.00008 %	—	Interpreted
Identification	Pass Test	Passes test	—	Interpreted
Insoluble matter	Max. 0.005 %	0.00088 %	—	Interpreted
Iron (Fe)	Max. 0.002 %	0.00020 %	—	Interpreted
Thiosulfate (S2O3)	Max. 0.05 %	0.0085 %	—	Interpreted
Sulfur dioxide (SO2), available	Min. 65.0%	66.5%	Iodometric titration (I2 / Na2S2O3 back-titration)	Interpreted

Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.

Available GradesSame CAS, alternate grades and concentrations

グレード	濃度	Typical Assay	SKU	TDS
This grade ACS Grade	—	—	current	current
Food Grade	—	—	sodium-metabisulfite-food-grade	View TDS →
Technical Grade	—	—	sodium-metabisulfite-technical-grade	View TDS →

Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.

物理的及び化学的性質

Property	値	Source
外観	White to yellowish	Interpreted
臭い	In the presences of traces of water, it develops an odor of sulfur dioxide	Published reference
pH	4 to 6	Interpreted
密度	1.4 (NIOSH, 2024) - Denser than water; will sink	Published reference
沸点	Decomposes (NIOSH, 2024)	Published reference
融点	greater than 302 °F (Decomposes) (NIOSH, 2024)	Adjudicated
Solubility (water)	Clear, colorless to faintly yellow solution	Interpreted

Materials of Construction

Material	Rating	Conditions	Source
glass (glass bottle packaging)	Compatible	dry solid ACS-grade powder as supplied; source states packaging only, no concentration or temperature	fishersci.com

Compatibility is drawn from published manufacturer and supplier documentation for this product; each rating is sourced. Confirm against your specific duty cycle before equipment selection.

Regulatory & Transport

DOT / 49 CFR

国連番号: 非該当Adjudicated
危険有害性クラス: 非該当Adjudicated
容器等級: 非該当Adjudicated
正式輸送品名: 非該当Adjudicated

GHS / OSHA HCS 2024

注意喚起語: DangerAdjudicated
H-Codes (Hazard Statements): H302, H318Adjudicated
P-Codes (Precautionary Statements): P264, P270, P280, P301+P312, P305+P351+P338, P310, P313, P330, P501Adjudicated

許容濃度

OSHA PEL (29 CFR 1910.1000): —no canonical
ACGIH TLV: —no canonical
NIOSH REL: 5 mg/m³ TWANIOSH Pocket Guide
NIOSH IDLH: —no canonical

輸送情報は発行時点の49 CFR 172.101の照会結果を反映しています。データ出典：REL/IDLHはNIOSH Pocket Guide、PELはOSHA Zテーブル。出荷に関わる重要な判断の前に、必ず最新の規制本文で確認してください。

Supplier Qualification Packet

One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Sodium Metabisulfite - ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.

Download audit packet

Applications

Used as an antioxidant, disinfectant or preservative agent (ACS/reagent grade material)labdepotinc.com
High-purity laboratory applications, where ACS-grade specifications are the reference standardlabdepotinc.com
Oxygen scavenging in steam boiler water treatment and removal of excess chlorine from wastewateressecousa.com
Reducing and sulfonating agent in chemical processing, including surfactants and polymerizationessecousa.com

Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.

Storage & Handling

Recommended Storage: 熱、湿気、水、酸および酸化剤から離れた、涼しく乾燥した換気の良い場所で容器を密閉して保管すること。湿気を含んだ空気中で徐々にsulfur dioxideを放出する。本製品はoxygenを消費するため、密閉された容器やタンク内で酸素欠乏が生じることがある。Adjudicated
Handling Precautions: Use standard chemical PPE — splash goggles, gloves, lab coat. Refer to SDS for hazard-specific PPE requirements.Class-level guidance — not product-specific; the SDS controls.
Incompatibilities: 酸（有毒な二酸化硫黄ガスを発生する）；水および氷；強酸化剤；亜硝酸塩および硝酸塩；塩素酸塩；アルカリおよび強塩基；重金属化合物Adjudicated
Shelf Life: Consult Technical Services for product-specific shelf life

For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.

Packaging & Logistics

Shipping Description (US DOT)

Not regulated for transport.

Confirm against shipping documents and carrier requirements before tender.

NMFC Class

Freight classification is a fallback estimate. Verify with carrier before tender.

Revision History

Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).

Version	Date	Change	Trigger
1.5	2026-10-13	Canonical data updated: 4 fields changed via the provenance/adjudication pipeline. storage_precautions· canonical change (coa.data_provenance / adjudication) incompatible_materials· canonical change (coa.data_provenance / adjudication) conditions_to_avoid· canonical change (coa.data_provenance / adjudication) hazardous_decomposition_products· canonical change (coa.data_provenance / adjudication)	canonical_change
1.4	2026-10-07	Canonical data updated: 3 fields changed via the provenance/adjudication pipeline. ghsClassification· canonical change (coa.data_provenance / adjudication) hazard_h_codes· canonical change (coa.data_provenance / adjudication) hazard_p_codes· canonical change (coa.data_provenance / adjudication)	canonical_change
1.3	2026-10-05	Canonical data updated: 1 field changed via the provenance/adjudication pipeline. oel_niosh_rel· canonical change (coa.data_provenance / adjudication)	canonical_change
1.2	2026-09-30	Canonical data updated: 1 field changed via the provenance/adjudication pipeline. meltingPoint· canonical change (coa.data_provenance / adjudication)	canonical_change
1.1	2026-07-17	Canonical data re-verified: 7 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable). countryOfOrigin· canonical adjudication / reground (coa.data_provenance) dotSubsidiaryHazardClass· canonical adjudication / reground (coa.data_provenance) ghsClassification· canonical adjudication / reground (coa.data_provenance) hazard_h_codes· canonical adjudication / reground (coa.data_provenance) hazard_p_codes· canonical adjudication / reground (coa.data_provenance) hsCode· canonical adjudication / reground (coa.data_provenance) physicalProperties· canonical adjudication / reground (coa.data_provenance)	canonical_change
1.0	2026-05-20	Initial URL-first TDS published from canonical chemistry registry.	initial

This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.