Industrial chemicals · Taylor, TXTechnical Data Sheet
Sodium Dichromate Technical Grade
Identity & Composition
- Product Name
- Sodium Dichromate Technical Grade
- Alliance Code
- sodium-dichromate-dihydrate
- Grade
- —
- Concentration
- —
- CAS Number
- 7789-12-0PubChem
- Formula
- Cr2H4Na2O9PubChem
- Molecular Weight
- 298.00PubChem
- Product Type
- pure_substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (as Na2Cr2O7·2H2O) | 99.0% mass min | 99.7% mass | — | Supplier specification |
| Chloride (as Cl) | 0.05% mass max | 0.005% mass | — | Supplier specification |
| Insoluble matter | 0.2 % by Weight maximum | 0.015 % by Weight | Methods and procedures described in "Reagent Chemicals", American Chemical Society (ACS) Specifications | Supplier specification |
| Iron (as Fe) | 30 ppm max | 5 ppm | — | Supplier specification |
| Matter insoluble in water | 0.05% mass max | 0.015 % mass | — | Supplier specification |
| Sulphate (as SO4) | 0.2% mass max | 0.04% mass | — | Supplier specification |
| Free moisture (surface water) | 0.5% mass max | 0.15% mass | Gravimetric loss on drying, 2 h @ 60 C | Interpreted |
Specification values are guaranteed limits. Typical values are representative of production lots and are not guaranteed. Lot-specific certificates of analysis ship with every order.
Physical & Chemical Properties
One or more physical-property values are temporarily suppressed pending verification against vendor COA data. For complete properties refer to the Safety Data Sheet (SDS) or contact sales@alliancechemical.com.
| Property | Value | Source |
|---|---|---|
| Form | Solid | Published reference |
| pH | 3.5–4.5 | Supplier specification |
| Specific Gravity (20 °C) | 2.35 | Supplier specification |
| Boiling Point | 240°C | Published reference |
| Melting Point | 125°C | Published reference |
| Flash Point | Not applicable | Published reference |
| Solubility (water) | High water solubility, moderate organic solvent solubility | Published reference |
Oxidizer — decomposition rate and gas-evolution data may apply. Consult the SDS for material-of-construction guidance under shipping and storage conditions.
Materials of Construction
| Material | Rating | Conditions | Source |
|---|---|---|---|
| HDPE | Compatible | neat technical grade dihydrate solid, assay 99.0% mass min; supplied packed in 50 kg HDPE drums | supremepetrochemicals.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.
Materials Selection Tool
Showing 15 of 17 materials compatible at the selected envelope.
| Material | Rating | Max T (°C) | Notes |
|---|---|---|---|
Buna-N (NBR) elastomer | Not recommended | — | Rapid degradation; never use with oxidizers. |
Viton (FKM) elastomer | Poor | — | Use EPDM or PTFE for sealing |
PTFE fluoropolymer | Excellent | 200 | Universal compatibility; preferred lining material. |
PVDF (Kynar) fluoropolymer | Excellent | 100 | Standard for high-purity peroxide service. |
Borosilicate Glass glass ceramic | Excellent | 100 | Inert to all oxidizers within normal service temperatures. |
Concrete (untreated) glass ceramic | Not recommended | — | Reactive; line with HDPE/FRP |
304 Stainless Steel metal | Fair | 40 | Surface oxidation at higher concentrations; passivate before service. |
316L Stainless Steel metal | Good | 60 | Passive layer stable; avoid prolonged service above 60 °C. |
Aluminium 1100/3003 metal | Good | 40 | Limit to dilute service |
Brass metal | Not recommended | — | Copper-induced decomposition |
Carbon Steel metal | Not recommended | — | Rapid corrosion; never use with oxidizers. |
Copper metal | Not recommended | — | Catalytic decomposition; severe |
CPVC thermoplastic | Good | 60 | Acceptable to 60 °C |
HDPE thermoplastic | Good | 25 | Good below 25 °C; reaction with peroxides accelerates at higher T. |
PVC thermoplastic | Fair | 40 | Embrittlement risk above 40 °C |
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN3087Adjudicated
- Hazard Class
- 5.1Adjudicated
- Packing Group
- IIAdjudicated
- Proper Shipping Name
- Oxidizing solid, toxic, n.o.s. (Sodium dichromate dihydrate)Adjudicated
GHS / OSHA HazCom 2012
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H272, H301, H312, H314, H317, H330, H334, H340, H350, H360FD, H372, H400, H410Adjudicated
- P-Codes (Precautionary Statements)
- P201, P202, P210, P220, P221, P260, P261, P264, P270, P271, P272, P273, P280, P281, P284, P285, P301+P310, P302+P352, P303+P361+P353, P304+P340, P304+P341, P305+P351+P338, P308+P313, P310, P314, P320, P321, P330, P333+P313, P342+P311, P362, P370+P378, P391, P403+P233, P405, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- —no canonical
- ACGIH TLV
- —no canonical
- NIOSH REL
- —no canonical
- NIOSH IDLH
- —no canonical
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: ECHA CLP Annex VI for harmonised classifications, NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Sodium Dichromate Technical Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Industrial manufacturingmubychem.com
- Used as a strong oxidizing agent (dichromate salt), supplied as the dihydrate Na2Cr2O7·2H2Omubychem.com
- Detergent manufacturingsupremepetrochemicals.com
- Water treatmentsupremepetrochemicals.com
- Construction additivessupremepetrochemicals.com
- Textile auxiliariessupremepetrochemicals.com
- Paper manufacturingsupremepetrochemicals.com
- Surface coatingsupremepetrochemicals.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
- Store sealed in a dry, ventilated area. Keep away from combustibles and reducing agents.supremepetrochemicals.com
- Handling Precautions
- Use PPE including face shield, chemical-resistant gloves, and apron. Avoid contamination — never return unused material to the original container. Ground all transfer equipment.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- combustibles, reducing agentssupremepetrochemicals.com
- 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)
UN3087, Oxidizing solid, toxic, n.o.s. (Sodium dichromate dihydrate), 5.1, PG II
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
Revision History
Last reviewed 2026-06-29 by Andre Taki, DOT Hazmat Specialist.
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.4 | 2026-07-23 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-07-22 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-21 | Canonical data updated: 1 field changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-06-29 | Canonical data re-verified: 11 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).
| 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.